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VarmLR

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Everything posted by VarmLR

  1. The other deceptive thing when reading comparative case capacities of the 260 V's Creed' is that with high BC 140gr bullets, the 260 has little to no advantage in effective charge volume because the bullet has to sit deeper into the case negating any paper advantage it might have with lighter, shorter bullets. I hadn't considered the improved L/A 6.5 x 55 baldie...that's quite a good shout if it (as you rightly point out) hadn't been for the 7mm taking over.
  2. VarmLR

    Punctured Primers

    As above....thin primers + pierced primers = gas cutting of firing pin (and bolt face) which exacerbates the issue and means increased risk of same on all future firings. I learned this the hard way and with .223 and 6.5CM you need to consider the use of magnum primers with a cup thickness some 5 thou thicker than standard primers to avoid this issue. Hope you get your rifle back soon with the issue resolved and sort a revised reload recipe. I can heartily recommend RS62 and Murom KVB-M primers or CCI 450 for LR or KVB-223M and CCI 250 for SRP brass. Come to think of it, I think better results were had a few years back with Remmy 7.5 primers in SRP brass (may still have some knocking about in supplies now I've reminded myself! Obviously Remmy 9.5 for LRP). Remmy ones are considerably hotter than the KVB or CCI magnum/BR versions from memory.
  3. The two main players imho are the ubiquitous 6.5 x 55 and the 6.5CM. Why those two? Well, the 6.5 x 55 has been with us a long time and brass is available just about everywhere for it. It's lower pressure/larger volume design means greater brass (and barrel life) and it remains an accurate calibre, with loads of sporting rifle (and ammunition) availability. I can't see this shrinking back into obscurity any time soon (not that it ever was). The 6.5 CM has succeeded commercially where the much older 260 Rem did not. Who'd have thought that a (for all intents and purposes) necked down slightly smaller cased cartridge than the 260 Rem would succeed where it failed? I can only assume that the 260 for some reason was way ahead of its time and just never took off partly down to the 30 cal being the defacto military cal of choice for so long and also of comp shooters for many years as well as hunters (the Do it all cartridge). Why then the 6.5 CM over the Lapua 6.5 x 47? Well, I was torn between the two and for me, the lack of factory offerings and ammo was definitely against the Lapua, the darling of so many custom gunsmiths and comp shooters and deservedly so. When I saw that Lapua were offering the small primer version of brass for the 6.5 CM, that sold it to me. A very similar cartridge design to the Lapua 6.5 x 47 but with greater case capacity and the ability to shoot the heavier bullets at higher velocities without going too high on pressures. I tried lots of different bullets with the CM, and like Laurie, found that it performed best with the heavier 139/140grn ones shot at between 2700 and 2800fps. Just recently I developed a load with RS62, which exhibits almost identical load/energy characteristics of the now banned (for sales) H4350 and the Hornady 140gr SST. Sub 1/4 inch groups in small primer brass using 43.6gr RS62. The group below shot this week shows two bullets through the same hole and one dropped slightly low. This was using SRP brass which requires more than 1.5gr more charge to obtain similar velocities to LRP loads so don't try and emulate this in standard brass!!! To arrive at this loading using standard brass (LRP) then you'd be looking at roughly a shade under 42gr RS62 or slightly less, so very much in the same ballpark as Laurie's findings with his 140gr bullets (bearing in mind also that the primers used here were not "hot" cooking varieties but thicker, "magnum" primer cups). The results with 139 Scenars were similar, helping me to win a 100 yd "tightest group" comp last year, much to the chagrin of those normally taking the contest with .223's! To shoot sub half moa in 16 to 23mph gusting winds with 5 shots was a challenge that the 6.5CM/139 Scenar was luckily up to. The 139gr groups average .25 inch with a personal best (5 shot) of 0.18 inches. This is a pretty typical 100yd group with the Scenar: All the above are from a standard factory Tikka Tac A1 6.5 CM, fast becoming my favourite rifle to shoot from my collection. At 1000 yds, it's a similar story to Laurie's findings, with the TicTac shooting 139 Scenars consistently into sub moa groups, more often than not 3/4moa, which from a factory rifle, is impressive stuff. My money is on the 6.5CM not being a "flash in the pan" but is here to stay and can be thought of as a slightly larger version of the 6.5 x 47 Lapua, complete with 30 degree shoulder angle. The 'x47 has it's die-hard admirers and so many win comps V's CM because so many more shoot in comp than CM! I can't think, from seeing the results of both at 1000 yds, there's any advantage in accuracy of one over the other. Sadly, I do see the 260 Rem as slowly sinking back into obscurity, this backed by all accounts by current sales figures of the two, a trend that is probably set to continue with the advent of increased choice of factory offerings for the (now decade old!) "new kid on the block" and its similarities with the inherently accurate 6.5 x 47 Lapua. Just my tuppenceworth. If I was starting out again and not after an all rounder for light to medium game as well as target, I'd probably go with the 7mm-08 Rem, or similar offering, as the 7mm has a similar advantage over any 6.5 chambering as the 6.5 has over the 30 cal. For comp, there's "no substitute for large CC's" and the larger, slippier bullet wins out every time hence why more seem to be going over to the 7mm. For me, the costs outweigh the advantages as my need is for an all rounder and here the 6.5CM still ticks all the boxes for me.
  4. VarmLR

    6.5 Creedmore

    I agree with what you say but for larger bullets, seated deeper, there's not a lot of difference in powder capacity between the two. For lighter bullets seated futher out, the 260 has a little more capacity. It's half a dozen of one and 6 of the other. If I already had a .260 there'd be no real justification to change to a 6.5. RE barrel length, Accurate Shooter published an article where a 6.5 barrel was cut down a little at a time and velocities tested for each length. Their conclusion was that the optimum length I think was 24 to 26 inches, and there was really little loss by the time they got to 20 inches. I think they finished at 15 or 16 inches and were still getting reasonable velocities. I guess the results need taking with a pinch of salt as it depends on the powder choice. If most powder is burnt by say 20 inches, then it stands to reason you'd not lose much velocity.
  5. VarmLR

    Tikka tac chassis v after market chassis

    The mag I understand will be revised in newer rifles as it doesn't provide reliable feed, certainly in my 6.5 where rounds aren't brought up square and often take two attempts at chambering. Nose isn't properly aligned with bore so sometimes when you think you've chambered a round you've just pushed it back into the magazine. The way to overcome it is to be slow and deliberate with the bolt, which has to be brought all the way back to the stop before attempting to feed a round. It's a non-issue (for me at least) once you get the hang of things. Varmint barrel in KRG sounds like a heavier solution? TAC chassis is great.
  6. Have you tried the tmk 175?
  7. I just use my rifle scope. It has no problem resolving bullet holes at 200 yds at all. I have a spotting scope too, one of the top of the range Hawke ones which is good (I can read a number plate at half a mile with it when atmospherics allow) but it's not as good as one of the older Kowas which would be my pick of the bunch. They've been doing spotting scopes, theodolites, and military ranging optics for donkeys' years. Newer ones I've looked through don't seem as good. However, once I'd upgraded to a PMII, the spotting scope was redundant for ranges to 300 yards.
  8. VarmLR

    6.5 Creedmoor Load Data

    RS70 may be a little slow burning for the 6.5. RS62 shares similar characteristics to H4350 which was the defacto "go to" powder for the 6.5 until REACH came along and works well with my 123 to 140gr bullets. Primers can affect both MV and consistency. With such slippery bullets, consistency is more important than the chase for high velocity which whilst always useful to limit wind drift, is not the be-all and end all with these bullets. My best shooting at 1000yds has involved velocities of around 2700fps with the 139 scenar and the sweet spot seems to be from 2700fps to 2800fps with the 139 bullet. Using SR primers, ignition energy is significantly lower than with the LR primers, and it pays to try various primers. CCI are ok (CCI250 or BR4) but you also have the choice of the Remington 7 1/2 benchrest primers, Murom KVB-223M (don't be tempted to the standard KVB223 unless you want pierced primers and/or gas-cut bolt faces!) and Federal 205M all of which seem popular amongst the LR shooters. The other thing to note is any variance between powder batches. I have found RS62 fairly consistent between batches but it is a crudely extruded powder with some large and uneven extrusions in the pot so taking extra care when measuring charges with that powder is a must. Viht N150/N160 seems better in that respect.
  9. Their shooting activities I understand may be suspended as they await a renewal of H/O approval.
  10. General licence for crow only released. https://www.gov.uk/government/news/new-general-licence-for-controlling-carrion-crows-comes-into-force No mention of magpie, rook, jackdaw or any other corvid...just carrion crow.
  11. VarmLR

    Get your Crow License here....

    General licence now issued for crow only. No general Corvid licence which is barmy.
  12. VarmLR

    Cheytac .375

    I was thinking more "John..."
  13. VarmLR

    6.5 Creedmoor Load Data

    If RS....email them with your requirements and they'll run a QL prediction for you to get you started. With that twist, to make the most of high BC bullets, perhaps look at the 139/140gr bullets/RS62/CCI400 or if going the small primer brass route, Murom KVB-223Magnum or Remmy 7.5 or CCI250 primers. For Brass there's Starline & Lapua both of which are popular. With the longer barrel, you might want to look at Viht N160 with the heavier bullets. My own choice of bullets is Lapua Scenar 139gr. I have found them consistent and accurate. Nostler competition also worth a look. From Sierra, I'd be looking at the #1740 140gr or even the 123gr #1727 driven fast. I have loads of data for the 139gr Scenar/RS62 but in a shorter (24") barrel.
  14. VarmLR

    155gr Lapua Scenar load for F Class

    In which case why not load some more up at that plus 0.1 either side...pick the best and play with seating depth? I must admit, every time I use some neck tension uniforming (Lee factory crimp) it almost always results in better consistency of shots.
  15. I doubt that Strelok is at fault as the maths is sound. What isn't are (generally) BC figures which are approximations based on form factors for either out-dated projectiles or crude approximations for the bullets you shoot. These are often incorrectly quoted by bullet makers. There's no "one BC" for all ranges as changes in velocity affect the BC. Strelok has functionality that allows G7 BC multiple figures to be used (using multiple values of BC over distance/with changes in velocity) which need verification at your distance, by measuring drops at say 300, 600 and 1000yds. You can then true the BC or the velocity in Strelok. I have tuned mine using the G7 multi-bc values then adjusted MVs and have found strelok to be very precise now when I want to shoot that load at any distance from 200 to 1000 yds. Last outing at 600m and strelok got me to within 0.2 MRads of correct elevation first shot on target which wasn't great but had I re-entered MV from the latest batch of powder, I would have found that it would have been more accurate, possibly within 0.1MRads. There's other considerations such as temperature effects on powder, atmospheric pressure, spindrift etc etc. By and large Strelock does a good job, as do many of the competitor ballistic solutions. You just have to learn their individual peculiarities and work with them.
  16. VarmLR

    155gr Lapua Scenar load for F Class

    Pops is correct. The only meaningful way to set COAL is from the case head to the ogive...that's all that matters provided it will mag feed. The Hornady bullet comparitor will help you here. It doesn't matter that the meplat to base is different as that isn't referencing to the lands, your ogive is. Also, if I may offer some observations Michal. Your conclusions RE the loads are a little wayward. You can't judge a load purely on group size. At distance, vertical dispersion matters, not just group size unless it is quite obviously opening up. There can be many reasons for increase in horizontal grouping from trigger technique to wind effects etc. Look instead at group centres, ES and vertical dispersion. Re-assessing your groups this way, your centre two targets look to be on the node, so if this correlates to 25.4/25.6 then you have a wider latitude than you think, and try the centre of this and then play a little with seating depth if you must, but to my eye, your ES figures look pretty good (are they in M/s?). There's another thread going that discusses accuracy discrepancies and tolerances. Your chronograph and scales both have tolerances of probably 0.5 to 1% or thereabouts so applied to your MV, your ES could be half as much in reality or twice as much. Look for patterns, and read the groups...your tightest vertical ones on the photos are the two centre ones. That's where I'd be concentrating.
  17. VarmLR

    Defiance / Eliseo 6.5x47 OCW

    2730 too slow for what though? It should be good enough for that high BC bullet to remain above transonic at 1000 yds. I think I shoot mine closer to 2700fps and get some very acceptable results. Others I shoot with have had equally good results at closer to 2800fps, but 2700 seems acceptable for informal target practice. You get marginally less wind drift at 1000 by dropping MV from 2800fps to 2700fps which may or may not matter to you.
  18. VarmLR

    Defiance / Eliseo 6.5x47 OCW

    37.3gr N140 seems to be a good node....not much MV difference one charge up or down, low ES and low vertical dispersion. That's the load I'd probably shoot.
  19. VarmLR

    Tikka CTR - Super Varmint

    I'd advise slightly differently. Don't buy a heavy barreled varmint or CTR for hunting, buy a sporting profile and shed the extra mass. You'll thank yourself, trust me. I'd go with a Shultz & Larsen personally for boar/deer in 270 or .308 and then buy a 6.5 of some flavour for target. The whole point of the 6.5, especially in CM flavour, is that long for calibre high BC bullets can be shot way under the velocities needed with a .308 and still get you way beyond 1000 yds above transonic. The .308 will shoot to 1000yds, just don't expect much precision from a 20 inch barrel...way too short to generate decent performance at 1000. Fine for steel basing and having fun, but for target, there's a reason serious comp shooters use 30 to 32 inch barrels in .308.
  20. VarmLR

    .22 zero problem

    Start with the "wiggle test" as someone once advised me many years back (a reference to diagnosing engine faults where before stripping things down you wiggle all the wires to check for loose connections!). Check bedding screws are to correct torque, then check mounts, then check mod is tight. If it is, remove the mod and check the crown of the rifle...any damage there?. I once cleaned my 77/22 Ruger which could shoot eley subs into an inch at 100 yds. It doesn't any more....more like 3 inches on a good day. I never clean it now...may take many rounds through before it does! The wax coating on bullets protects the barrel from much fowling up. I occasionally run a patch or bore snake through it but that's all. If none of that works, try different ammo. Before you do, try swapping the scopes over...it's not inconceivable that the scope may have a faulty turret...stays on zero for a few but then goes off.
  21. VarmLR

    HbN users: what's your cleaning regime?

    You need to take up knitting and hand your wife your rifle collection Lol! 🤣 Impressive stuff.
  22. VarmLR

    New barrel breaking in

    That's impressive from a new barrel on factory ammo This was my own attempt on my first home loads for the CM, at 100 yds. 6.4mm centre to centre/13mm edge to edge. (.25 moa). 4 shots only though so extrapolated would probably have been twice that at 12 shots. My rifle seems to love the 139 scenar.
  23. VarmLR

    New barrel breaking in

    ...but only if you first coat the barrel and bullets in go faster dust....no, that was naughty....must not stir the pot, I must not stir the pot
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