From previous experience, here is what we recommend around the shop:
1:7 is not the best choice for the available bullet weights in common "retail" land....
1:7 is a faster spinning bullet rate
, which means you have to shoot the heavier bullets out of them ( probably in the 77 grain, or higher, environment ). Most of the common civilian and military stuff is either 55 grain or 62 grain. With a faster twist rate
, and the right conditions like high heat and low moisture, you could very easily overspin a 55 grain bullet and get it to particl-ize ( I made that word up ) and therefor would be useless in the field.
Now, if you were reloading, the 1:7 twist
with the heavy bullets would give you great knock down potential over someone shooting the 55 grainers all day long.
So, basically plus one on what Robo said.