SteveBurton
Formerly 'Jackmonkey'
I've been kicking around ideas for my next build and I wanted to build a 6.5-7 PRC with a shorter barrel, around 20-22", and shoot Berger 156 EOLs. Then I was thinking, why not add some more displacement and do a 6.5 300 PRC? I already know that the more powder you burn down a barrel the shorter it's life will be so there is no need to rehash that argument. I grabbed some info from the 'internets' about approximate case capacity which I've listed below.
6.5 PRC - 68 grs
7 PRC - 73 grs
300 PRC - 77 grs
264 Win Mag - 82 grs
26 Nosler - 93 grs
I've read were Scottw2119 was getting 3200-3300 fps with the 156 EOL out of a 6.5-7 PRC and I think I remember elkaholic saying a customer was getting 3500 fps + out of a 30SM necked down to 6.5. I'm assuming they were using 24"+ barrels. Both of those cases are well below the 264 Win Mag and 26 Nosler in the amount of powder burned and are outperforming them as well. I guess my biggest question is, at what point do you reach diminishing returns in case capacity in relation to speed? Will I be able to find a suitable powder to use in a 20-22" barrel without having a flame thrower? I'm just thinking of ways to add more speed to overcome the shorter barrel length.
Does anyone have any experience with either or both? TIA
6.5 PRC - 68 grs
7 PRC - 73 grs
300 PRC - 77 grs
264 Win Mag - 82 grs
26 Nosler - 93 grs
I've read were Scottw2119 was getting 3200-3300 fps with the 156 EOL out of a 6.5-7 PRC and I think I remember elkaholic saying a customer was getting 3500 fps + out of a 30SM necked down to 6.5. I'm assuming they were using 24"+ barrels. Both of those cases are well below the 264 Win Mag and 26 Nosler in the amount of powder burned and are outperforming them as well. I guess my biggest question is, at what point do you reach diminishing returns in case capacity in relation to speed? Will I be able to find a suitable powder to use in a 20-22" barrel without having a flame thrower? I'm just thinking of ways to add more speed to overcome the shorter barrel length.
Does anyone have any experience with either or both? TIA