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Triffid

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  1. PS. I use the SR-Magnum S&B primers successfully in 6.5 CM - ten shots with single-figure ES's. I'd very happily buy more if I find them.
  2. I've just spent a pleasant half-hour trying to answer your question, having both sorts to hand, plus a tube micrometer. I'm not able to measure the base of the cup, but the side-walls of both types are 0.0120-0.0125". They appear quite identical to me, apart from the colour of the packing which sits between the compound and the anvil.
  3. If it helps in any way, I did this comparison spreadsheet a couple of years ago when I was looking for a similar scope. Focus is on MoA rather than Mil scopes and there have been a few new additions since. Glass.xlsx
  4. Hornady have produced a series of podcasts about various aspects of shooting & reloading. I linked one on Barrel Tuners which has prompted some interesting comments. Delving further, I've come across a series looking at the impact of sample size on load development, which pretty much rubbishes the normal ways I've used (eg Ladder / OCW). The podcasts are long and detailed, but my takeaways from it are: 1. To get a representative idea of group size, you need to fire about 30 shots. 2. Conclusions based on smaller number of shots (eg 3 and 5 shot groups/velocities) are invalid. Using exactly the same load, you are likely to shoot very different 3 and 5 shot group size, velocities and/or zero position. 3. You can use small samples to identify 'bad' loads, but not 'good' ones; if a three shot group measures 3MoA, it cannot get any smaller. But a group measuring 0.5MOA can only stay the same or get bigger. 4. Their load development process consists of throwing different combinations of components at the rifle to see which ones work. No powder charge work-up or seating depth changes; with large sample numbers they find that there are no 'nodes'. I'm going to try shooting ten five-round groups of my favourite load . . . Triffid
  5. Interesting Hornady YouTube video about Barrel Tuners . . . Enjoy! Triffid
  6. More depends on availability than preference! I'm running Lapua 139 Scenars over RS62 in Lapua SRP brass with S&B magnum caps. That can give me an MV of 2750 with ES of <10 if I do my part, with a sub 0.7MOA ten-shot group out of my stock RPR. I got bulk orders of RS62, primers and Scenars couple of years ago and that will last me through 2024. After that I'll move to a Vit powder, probably N160 or N555, simply because of availability where I am. I don't want to have to keep redeveloping loads because of component shortage, so I'll buy enough for 1000 rounds in one go. Triffid
  7. I use a Lee hardness tester. Not that I aim for anything particularly - range scrap works well as is.
  8. I use range scrap. Typically it gives me about 12 BHN.
  9. I'll be watching replies with interest as I'd also like to go this route. The problem for me with 338 Lapua is the blanket ban at Bisley for that calibre, which makes it a non-starter. So I was thinking more about one of the Gucchi 30 calibres - WinMag, Norma Mag or PRC. But I don't know much about the subject . . . Triffid
  10. You don't need to go to a range. Just find some way of holding the rifle steady (such as a cleaning rest) pointing at a fixed place, ideally some distance away . . a brick wall is ideal as you get an idea of the scale, but don't upset your neighbours! Then, looking through the scope without touching the rifle, move the elevation and windage turrets throughout their range. You should see the reticule move consistently across your target. Triffid
  11. My Ballistic calculator agrees with everyone else’s ballistic calculator . . . about 10moa up from a 300 yard zero. I’ve seen several mid-range Vortex scopes fail with turret problems in my Club. Try locking the rifle down and moving the scope through it’s elevation and windage ranges to see whats actually moving against the reticle. Triffid
  12. The Vihtavouri load data for 6.5 Creedmoor is here: https://www.vihtavuori.com/reloading-data/rifle-reloading/?cartridge=95. I note that, in that bullet weight range, N150 gives 150-200 fps less velocity than some of the other candidates. So unless there are other reasons for developing a load using that powder, it is not an avenue I would pursue. Triffid
  13. Chap on ebay sells them: https://www.ebay.co.uk/usr/mineproducts?_trksid=p2047675.m3561.l2559 Triffid
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