Excellent advice from @dodgyknees as a general rule, BUT current manuals don't offer a great choice from among the powders that are available here post-Reach. Hornady #10 has NO Viht loads at all, nor Lovex, and of course, no Reload Swiss apart from Alliant Re17 (RS60 to us). Sierra #VI also has no Viht loads, but around half of the 16 loads for its 130gn bullets are available here (some not very well /plentifully though) only six out 15 for 140s though. Between the two manuals, there is only a single Ramshot powder load for 130/140gn bullets. Lyman #50 is generally much better than the other two on Vihtavuori loads for many cartridges, but they're nearly all entries that go back over several editions. For 6.5 Creedmoor, a more recent introduction, there are again no Viht loads at all. Taking 130/140gn jacketed bullets again, the 130 has only one powder in the table that's available here (Alliant Re15), and the 140gn table also has Re15 but now with the addition of Ramshot Hunter, giving a grand choice of two propellants.Your right a manual is a good place too start.im asking what people with the caliber have had good results with not what they load too I can do that myself. Just a bit of advice that's all
Yeah, for the previous Creedmoor, it gave exceptional accuracy at a lower charge rate of around 39 gr but only about 2500 FPS, max load at 42.2 gave some cratering on the primer (lap brass fed 205) But around 1/2 moa. This was my McQueen and our to 600 load and I had a RS60 load that gave 2850 FPS for 800-1000 yards, all with Lapua 139 scenar.N160 doesn't work for everybody in this cartridge and they get better results with N150. (.............. or vice versa!) That's no doubt why Viht has introduced N555 as neither 150 nor N160 is optimal in this application.
Note though that (unlike every other N500 grade) it has a 'normal' specific energy level, in fact marginally below that of N150 according to Viht's online product details. So, it's unlikely to produce as high MVs as RS60 or many of the new Alliant grades which apparently contain a lot more nitroglycerin. On the other hand, the barrel might actually see 2,000 rounds through it - a figure I'd have grave doubts about for many Creedmoors in competition use allied to the powders being used, and what must be way OTT pressures they're apparently being run at if some quoted MVs are accurate.
Ramshot Hunter has a combined 'heat of explosion' of 3,910 J/g against RS60's nominal 3,990. That may not sound like a big difference, but a reduction of 80 is well worthwhile if barrel life is a concern. (3,910 is a lot more than N160's 3,650 J/g though, or N150's 3,750 J/g.I don’t know if the double base hunter will be any kinder on the barrel than the RS60