Originally Posted by Tikkamike
If you read my post again you will see that even with the extended magazine box the 338 RUM barely fits with a longer bullet. the extended magazine box is only about 1/10 on an inch longer and then you have to get your bolt stop milled so that you can pull your bolt back long enough to catch the next round out of the magazine.
OOoops... Okay now i've read it
I installed my own extended box and i can tell you that it makes a big difference . Like you already mentioned the "bolt stop " has to be milled inorder for the bolt to come back far enough to catch the back of the shell that's what made me realize just how much further I can seat OUT my bullet ! I used a table grinder to "mill " my bolt stop
it doesn't take a rocket engineer to do it .