I own a RAR bolt action rifle. I recently purchased the Barnes 200gr and 275gr XPB bullets as well as the Hornady 240gr XTP Mag bullets. Looking at these bullets I'm wondering if I should crimp these bullets under the driving band groove and under the cannelure? I was thinking that would be a way of getting bullets closer to rifling. Or should I go for better ignition and use the cannelure/driving band groove? I plan on using only the Hornady taper crimp. If you think that I should use the cannelure/driving band groove, what is the best orientation of the case mouth to the cannelure/driving band groove? Top, bottom or middle of cannelure?
Since my rifle has a 1 in 16 twist, will there be more pressure built up in my rifle than in a rifle with a slower twist rate like the ones listed in reloading info that I have seen. If that is the case, should I back off my starting loads from what is listed for the slower twist rates? Will there be added pressure built up because of the solid Barnes bullets?
Reloading the 450BM is a total head scratcher sometimes. I know that you are a wealth of knowledge here on this forum so I have come to learn from the best. Thanks for your help with my questions.