Shooters Forum banner


2055 Views 6 Replies 6 Participants Last post by  Ozzy
I have a friend that has a 30-378 McMillan Rifle with a 30" inch barrel. The rate of twist is 1/10. The action is bedded and the barrel is free floated from the lug to the tip. He hand loads his ammo and is running a velocity of 3200-3300 fps. He is using a 180 grain bullet and cannot get better than a 3" group at a 100yrds. I suggested a 200 or a 225 grain bullet and backing down of the fps. I'm not sure of the powder but he said that he has the slowest burning powder he could find. He has 113 grains of powder with a slight compressed load.. My question for all those who are smarter than me is ..... What would you recommend he do with the situation...
1 - 1 of 7 Posts
We'd need a lot more specific information to provide any kind of meaningful response, but if the groups are no better than 3" at 100 yards, there is something wrong with the gun or the shooter is simply afraid of the recoil.

Also, 3300fps for a 180gr bullet is about the right velocity, with 113 grains of H870. Even with a 30" barrel, 3200-3300fps is in the ballpark. The best you could get would be maybe another 100fps...even Weatherby's factory ammo only claims 3,400fps. Incidentally, there are only a few powders slow enough to be appropriate for this cartridge, the most common of which is H870. Check back with us if you can get the exact load recipe your friend is using.
1 - 1 of 7 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.