I wanted to shoot a round into some phone books.

How many inches do I need do you think?

.340 Wby. 275gr Swift A frames

Also should they be dry or wet? any difference?

I read 1 report of 7.5" with swift aframes, didn't know the cartridge though.

I plan to have 15" + but not sure if I need 20" 30" 50" or what....and how big of a difference wet vs. dry would make?