head to head accuracy

I think I'd have to agree... Heck, you could have two of the same exact guns side by side, shoot the same loads, use the same shooter, on the same day and get different groups... I guess guns have "personalities", like people and guitars...

Everything I've read says it does make a difference, same with altitude and humidity, at least with longrange shooting... Pistols? Don't know...it might, but is probablly not enough to worry about.