What will it shoot a 400 gr bullet at?I have been wanting to try a 416 ultra mag but I didnt know if it was worth the trouble or not.I have 8000 rounds of 416 rem mag brass and about 5000 416 bullets.They quit making my favorite the 416 325 gr barnes x bullets.It shot 2800 fps out of my 24 inch marrel 416 model 70.I thought about converting another model 70 if i ever find one decient priced again.I am wondering how long they will make 375 ultra mag brass.Its not very popular and has increased in price a bunch after it came out to now.I was just wondering if the 416 ultra mag is worth the trouble.