Thanks a lot Steve. [img]images/icons/smile.gif[/img] If you get a chance, the capacities would be handy in evaluating them for sure.
I wonder if that long neck theory has been seriously tested on very many barrels or just enough to convince the right people that it spread real far and fast.
Here's a link I found last night that might explain where it started or maybe it's just another wright up on it too. I'm still wondering how this smith up here figured out a .405" neck length in my 30/338 Lapua Imp would be optimal, it differs from the formula that was explaned to me by another smith that was telling me how the other smith figured it. The other smith, he's a little tight lipped about how he figures it exactly, but did figure mine out for me though. He may be using the formula presented in that link, I've not checked to see what that one suggests for the 30/338 yet.
I'm getting a good idea on the possible throat errosion and MV with all the good info comming in. [img]images/icons/smile.gif[/img]
Funny you mention the 155gr SMK, my dad and I were talking about it last night, basically wondering why if his 9 twist 6.5 WSM would shoot them at all, it is pushin the 140's a little faster than some of the smaller, more popular 6.5's but, nobody ever talks about the 155 though, been wondering why. They would probably be moving along at 3100-3200 or so if he tried them.
Dad gave me money to order him a 28" Pacnor .338" bbl last night for a 338WSM he's building. He wants it for shooting the 300gr SMK in another Rem 700 LALH he picked up. I don't know what MV he's likely to get, maybe 2500 or so. He wants a 10 twist, and I told him about the 3 groove bbl I think Pacnor has but, I'm wondering if he might need more twist if he's pushing them 300's that much slower.... I know, why the 300 SMK in a little WSM case at only 2500? He just wants it for 500-600 yds, and loves the 300 SMK, did I also mention his love affair with the WSM case. [img]images/icons/rolleyes.gif[/img] [img]images/icons/grin.gif[/img] I can't convince him to get a neck and throater reamer to use with this 30/338 Lapua Imp reamer I'm getting, I know he'd be much happier with the external ballistics of it... but at the rate he's building all these damn guns he'll have one of them by this fall too! [img]images/icons/grin.gif[/img]