gunnery Posted January 26, 2012 Report Share Posted January 26, 2012 went to diggle today to try new load out 5 shot group on A layout all i did was add half grain to my usual load this was the results Link to comment Share on other sites More sharing options...
DaveT Posted January 26, 2012 Report Share Posted January 26, 2012 Accuracy nodes in my own 260 seem to be about 1 grain or so apart..... never ceases to amaze me to see the group grow then shrink again with varying charges.... then when it comes together in the classic 'ragged hole'' = big smiley face!.... nice one! Link to comment Share on other sites More sharing options...
gunnery Posted January 26, 2012 Author Report Share Posted January 26, 2012 just had all my brass annealed maybe that helped to Link to comment Share on other sites More sharing options...
gunnery Posted January 27, 2012 Author Report Share Posted January 27, 2012 what seating depths or oal do you use in .260 do you load just of lands or standard 2.800 Link to comment Share on other sites More sharing options...
DaveT Posted January 27, 2012 Report Share Posted January 27, 2012 what seating depths or oal do you use in .260 do you load just of lands or standard 2.800 Gunnery... I have mine set at A Hornady Comparator reading of 2.2695 (Scenar 123g) which equates to 2.846 Head-to-Tip COL albeit that measure is a bit 'iffy' due to bullet manufacturing variances as you will know. That should 'JUST' be shy of my lands and it goes through the Mag just fine. I found that loading just that little bit longer to 2.270 (Comparator measure) made chambering a little stiff so reckon I am as close as I can get to teh rifling without JAM. Seems to work well in my 260 with Viht N550. Link to comment Share on other sites More sharing options...
gunnery Posted January 27, 2012 Author Report Share Posted January 27, 2012 Mr T your load is same as mine powder, bullet, but i have found i get best groups around the 2.800 mark (strange)are you using lapua brass or remy again i compared lapua against remy for volume. Link to comment Share on other sites More sharing options...
DaveT Posted January 27, 2012 Report Share Posted January 27, 2012 Mr T your load is same as mine powder, bullet, but i have found i get best groups around the 2.800 mark (strange)are you using lapua brass or remy again i compared lapua against remy for volume. I use Lapua whenever I can ....brass longevity and minimal clean-up from new. Mine shows good accuracy at standard length as that is where I started and I was not by any means unhappy with the grouping ... but I think that it has tightened as I got snugged up to the lands. Naturally each gun will show its preference! For what its worth and with the usual caveats my accuracy nodes are appearing at 42g and 43.2g of N550... the former giving circa 3005 from a 30'' barrel and the latter not yet chronographed. At present I am feeling out my upper limits and looking for minimising the ES. After all that I start all over again on 139g Scenars! Link to comment Share on other sites More sharing options...
gunnery Posted January 27, 2012 Author Report Share Posted January 27, 2012 i have never tried 139grn scenars heard some good reports about them but i have always been happywith the 123grn scenars let me know how you get on if you dont mind thanks Link to comment Share on other sites More sharing options...
Hatzi Posted January 27, 2012 Report Share Posted January 27, 2012 I shoot 139 scenars through mine and have never wanted to shoot 123's although i have tried them. The case is big enough to drive the 139's comfortably fast enough to present better on paper ballistics. Re17 provides huge velocities but i find it inconsistent and prefer the milder but more reliable H4350. Link to comment Share on other sites More sharing options...
DaveT Posted January 27, 2012 Report Share Posted January 27, 2012 i have never tried 139grn scenars heard some good reports about them but i have always been happywith the 123grn scenars let me know how you get on if you dont mind thanks No problem.... I just like to have an alternate load in case of component shortage etc..... might also be better at distance in the wind! Link to comment Share on other sites More sharing options...
Jagged 77 Posted January 27, 2012 Report Share Posted January 27, 2012 How are you guys finding the Lap .260 brass? I bought 200 and after 3 firings found at least 50% of the primer pockets loose. Some of the is down to load development admittedly but even so I'm not sure its all down to hot loading... Just settled on H4350 and 140 SMK's which are proving to be outstanding. Link to comment Share on other sites More sharing options...
DaveT Posted January 27, 2012 Report Share Posted January 27, 2012 Lapua brass all good so far (Couple of pockets do prime 'easily' but not what I would call loose as such) .... I do work up very gradually so no mega-loads & even though I am over the book max I load to a long COL which takes the 'sting' out of things ! My brass is on 7th firing and no pressures or problems so far. Link to comment Share on other sites More sharing options...
DaveT Posted January 27, 2012 Report Share Posted January 27, 2012 I know that pretty 'stiff' loads of H4350 are the favoured American setup but I typically use Viht powder provided it gives me good results as its simply cheaper. Link to comment Share on other sites More sharing options...
Jagged 77 Posted January 27, 2012 Report Share Posted January 27, 2012 Yep I'm with you on the Vhit powders and I use them wherever possible. Tried N160 and N165 with reasonable success in the 260, not tried the N550 admittedly. The load I've settled on is only 42 grains H4350 giving around 2650fps - minimal pressure signs, it is however an extremely accurate and consistent load. Link to comment Share on other sites More sharing options...
DaveT Posted January 27, 2012 Report Share Posted January 27, 2012 Yep I'm with you on the Vhit powders and I use them wherever possible. Tried N160 and N165 with reasonable success in the 260, not tried the N550 admittedly. The load I've settled on is only 42 grains H4350 giving around 2650fps - minimal pressure signs, it is however an extremely accurate and consistent load. I did try H4350 and my load with a 139g Scenar in another 260 that I own was nearly the same as yours at 42.5g... never did get to Chrono it but it seemed faster than the alternate load of Viht N560 that I was using and which my son still uses in his 260 (44.5g which gives 2700 and Brill accuracy) I also got up to 41.3g of RL17 and no pressures showing at that accuracy node. Link to comment Share on other sites More sharing options...
gunnery Posted January 27, 2012 Author Report Share Posted January 27, 2012 jAGGED77 what is your barrel lenght with 42.5 grns Vit 550 mv 2911 26" trueflight barrel groups as picture above as regards lapua brass i am getting better acuuracy with remy brass dont no why really i know they say lapua brass more consistant but remy seems to group better as photo Link to comment Share on other sites More sharing options...
Jagged 77 Posted January 27, 2012 Report Share Posted January 27, 2012 Gunnery, its a 26" barrel. I've tried pushing the 123's and 139's fast but it likes the slower speeds. I hear what you're saying about RP brass I use it too. In fact my accuracy load for the 260 was developed with F/L sized and chamfered Rem brass. Link to comment Share on other sites More sharing options...
Hatzi Posted January 27, 2012 Report Share Posted January 27, 2012 Re 17 was 3000 + fps capable in the lesser quality Nosler custom brass without pressure problems on the 139's but it made a lot if sense to back way off. When i did use it, i was happy at 2840fps off 43.4gr. Certain powders mentioned have caused some disastrous failures i have seen from questionable batch to batch consisteny but this was on loads people were smoking the ###### off anyway so thay are equally to blame. 42.4gr of H4350 gives me 2780 fps from a 26" border/ archer. Link to comment Share on other sites More sharing options...
Jagged 77 Posted January 27, 2012 Report Share Posted January 27, 2012 I've not tried the RE17 in the 260 yet, I do however use it in .243 with excellent results. Maybe worth a shot (excuse the pun!) Link to comment Share on other sites More sharing options...
DaveT Posted January 27, 2012 Report Share Posted January 27, 2012 I shoot 139 scenars through mine and have never wanted to shoot 123's although i have tried them. The case is big enough to drive the 139's comfortably fast enough to present better on paper ballistics. Re17 provides huge velocities but i find it inconsistent and prefer the milder but more reliable H4350. Hatzi.... I have seen many comments re the inconsistency of RL 17 outweighing its velocity advantages.... are we talking about pressure being OK on one batch and way out the next (temperature issues?) or some other factors? I have three tubs in my stock to use at some stage! Link to comment Share on other sites More sharing options...
Hatzi Posted January 27, 2012 Report Share Posted January 27, 2012 It wasnt so much dangerous pressure problems but i found that 3 1lb tubs over the course of 3 months were giving quite wide velocity shifts and unexplainable accuracy variations, not in line with other variables like temperature either. It was dirty in my gun and sometimes id look back on a competition performance and wonder how the hell i could shoot good groups at 500 yards with intermitently questionable results closer in, i just never "learned" the ammo whereas with the 4350 accuracy was consistently dependable. Re17 was bloody dirty too, also inconsistently though??? I think im too conservative these days, i just cant fall in live with double based powders, they always seem to NEED running at breakneck pressures and if that is combined with batch to batch inconsistency, its not confidence inspiring. I have done enough reloading to not want to be -10% re-testing new tubs of powder and essentially wasting bullets, brass and barrel but that is purely my opinion. Link to comment Share on other sites More sharing options...
Alycidon Posted January 27, 2012 Report Share Posted January 27, 2012 How are you guys finding the Lap .260 brass? I bought 200 and after 3 firings found at least 50% of the primer pockets loose. Some of the is down to load development admittedly but even so I'm not sure its all down to hot loading... Just settled on H4350 and 140 SMK's which are proving to be outstanding. Then you load is to hot !!, the primers must be well cratered. I assume headspace is not an issue if it was put together by a reputable builder. A Link to comment Share on other sites More sharing options...
John MH Posted January 28, 2012 Report Share Posted January 28, 2012 just had all my brass annealed maybe that helped to Must be the answer. Link to comment Share on other sites More sharing options...
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