OK, I've heard plenty of anecdotal stuff, but does anyone have any good references concerning the 40 and 45gr bullets (lightweight varmint with thin jackets) and them 'splodin from the higher rotational speeds that you get from the 1:7 barrels? And please, none of the stuff about 'It never happens!'...I've seen what happens when you don't twist them enough; keyholing 62gr bullets at 25yds is pretty impressive...but blowing apart 40gr varmint bullets? I just want proof...one way or another. I'm looking at getting an M&P with a 1:7 twist barrel, but its going to spend more time on my lap with a coyote call in my hands than knocking down doors, so a 1:9 isn't bad...but its not available on the rifle I want. TIA, GT braintrust... Byrdman Wanna kill these ads? We can help!