30 Sherman, 30 Nosler, 300 PRC

[loaders_loft]

We'll see if the velocity increases with more rounds. I'm just under 100 rounds now.

 

[highdrum]

You guys need to get ur barrels throated to 225-235 freebore for the 215 Bergers. I never saw pressure in my rifle till 86.3gr H1000 here's the ladder results. Barrel only had maybe 100 rounds on it at this point.

 

[loaders_loft]

You guys need to get ur barrels throated to 225-235 freebore for the 215 Bergers. I never saw pressure in my rifle till 86.3gr H1000 here's the ladder results. Barrel only had maybe 100 rounds on it at this point.

While I appreciate your results, there must be more to it sir. Did you see the details I provided including freebore?

 

[highdrum]

While I appreciate your results, there must be more to it sir. Did you see the details I provided including freebore?

My bad I now see that. You may have a hot lot of H1000, it's pretty inconsistent lot to lot. I'd suggest trying N565 rl26 or Retumbo as well.

 

[loaders_loft]

If I had a hot load wouldn't it show up as a higher velocity at a lower charge?

 

[highdrum]

If I had a hot load wouldn't it show up as a higher velocity at a lower charge?

sometimes it'll pressure out early and not get the velocity you're after, could be a tight bore. Not the first proof carbon I've heard of that's done it.

 

[highdrum]

If I had a hot load wouldn't it show up as a higher velocity at a lower charge?

Really suggests trying a slower powder if possible.

 

[Wild Monkey]

Might as well... If you've got the Room and you want an easy way to get there, just say Ultra Magnum: https://www.longrangehunting.com/threads/300-rum-or-300-rum-ackley-impr.212671/