Originally Posted by Machann
The reason why I'm asking is because according to me the difference in length between the 300gr and 250gr Berger is .22 which wil require me to seat the 250 gr bullet outside the optimum range in the case or have a massive jump? If you consider the Lapua and Sierra and Berger they are all approximately the same length and result in the same COAL. My assumption is that you will still be in range for the the other 250gr bullets? Please, I'm no expert and some expert help will really be appreciated
I don,t consider my self an Expert ether, just with 50 + years experienced and know that Free bore is not the enemy, chamber dimensions are. I don't have a SAMME spec. for the new 338 Norma mag but if memory serves me you should have about .200 thousandths free bore.
The 250 grain bullet has a long enough body to reach the lands and still have plenty of bullet
engagement in the neck the 300s will have to be seated deeper if you shorten the free bore.
I don,t want to talk you out of a custom reamer, just warn you about the problems that come with it.
For velocity, free bore is your friend, for accuracy with free bore the chamber, especially the head space
is also your friend.
You don,t have to touch the lands to get accuracy.
J E CUSTOM