Starline Brass

[laowho]

Do the Jamison. Beside the obvious quality advantage to the Jamison, the only difference is the headstamp.

Sorry to be a PITA, but reading up on the considerable freebore of these Miroku 45-90s (Creedmoor Badger f/ 2006) and am wondering whether the 100 brass is in order. I have a Wilson trimmer. Seemed to me that you have some familiarity w/ this particular rifle, so thought I'd ask whether there'd be any real advantage to turning, or whether I'd be just as well off ordering the 90 brass. Thanks, Doug

[Don McDowell]

I don't know about that 90 chamber, but I would imagine that trimming longer brass down won't do much unless you are looking for thick walled paper patch brass.

[Mike]

Doug, I'd go with the standard .45/90 brass because you can always load the cases with the bullet seated further out to match or counter what freebore your gun might have. Do some shooting and see what the problem really is before you try to cure it. Shoot sharp, Mike

[laowho]

Well Don, Mike,

In order, I'm tryin to look down the road, and if/when I undertake PP some have said I'll want some proper length brass for it. Montana Charlie was good enuf to post the dimensions and a DanT bullet designed for it

http://www.warwhite.top/showthread.php?2...rocu-45-90

and the second page has Semtav recommending the proper brass length to accomplish the desired result. Elsewhere Wayne (TexasMac) has gone into stretching the brass for optimum length. So it's not as tho I've gone in search of a problem as much as I try to do some homework before plopping down $200 for brass that might not be optimal. Cheers

[Don McDowell]

Maybe you can get ol Montana Charlie to post a picture of all the trophies he's won...

[laowho]

Ok Guys, Granted I don't know all the who's who in the world of BPCR, but at .260" of freebore and the dynamics involved, figured the question is legit. But if my postin it has me twixt a rock and a hard place, twixt the Scylla and Charybdis of "doesn't matter unless..." to "a problem in search of a solution," then that's the way it is. But I'm gonna say this--ad hominems or "overthinking" dismissals are the sort of dead-ends I'd expect at less worthy forums. Now Don, forgetting who posted the dimensions for a second, what you said about PPing seems to apply, so I thank you for that, but the merits of his shooting do not. Peace

[Don McDowell]

.260 is about equivalent to two lube grooves on a good bullet.
Before you start tearing your hair out about a supposed problem, you may want to shoot that rifle and see if it really is a problem or not..
While I can't speak to the Miroku 45-90 chamber I can speak to two separate rifles in 45-70, one from Winchester and one from Browning, and I can tell you with certainty, that loading grease groove bullets to the driving band, irregardless of the freebore, will produce match winning accuracy, and by using a quality lube and fouling control leading in the chamber and throat is non existent.
And yes if you choose to use as example from someone who has never owned or fired the rifle in question, and has never fired a shot from anyplace other than his own back yard, with nobody to verify his results , the merits of his shooting can be called to question.

[laowho]

No Don, It wouldn't matter if Helen Keller had posted those schematics, cuz neither she nor he were claiming to know what was needed or how this barrel shot--he was only helping out with the numbers. Doesn't matter whether he ever shot that rifle, so there's no need to bring in his lack of general marksmanship. One thing's got nuthin to do with the other. God forbid he should offer cold hard date on freebore specs just cuz he can and wants to help? Neither was I usin him as an example--of anything. He simply provided the numbers. God help him.

And nobody's pullin their hair out. Several people have stretched 90 cases or turned 100s back for this particular barrel, including the shooters who contributed their load data to Wayne's book on the rifle, but I'm sure you can say the same thing about them, right? WTH do they know? So just lemme get this straight fore I go--you can't provide schematics for a barrel unless you've won with it, and you can't ask Qs here about what others have done with their brass for a given barrel w/o your hair bein on fire. Good to know.

ps. And just found another thread wherein DanT recommended usin 100 brass trimmed back for this particular configuration. Not to worry. It's just my hair.

[Don McDowell]

Well hope it all works out for you.

[laowho]

I believe you Don, and your generosity says I'm right to do so. And I told you in my very first post here that I often defaulted to using your name in Google searches to cut to the chase and through the confusion. And Mike held my hand through that first post and helped me as much as anybody here. But my question today is relevant, and the specs are what they are regardless of who happened to provide them. So let's just leave behind stuff that doesn't pertain and get down to driving some brass tacks. I've found from 2013 info that Wayne had consulted w/ DanT on this question. Dan's reply was that any brass in excess of .010" short of full chamber length begins to deteriorate accuracy. Standard length 90 brass will have me .020" to .025" short of full chamber length, so I'll probably turn some 100 cases anyway, even if only cuz "I gots to know" and b/c I didn't just pick up BPCR to plink every weekend. Dunno whether the aforementioned consideration was specifically aimed at PPing, but as I'll be trying that anyway it hardly matters. Cheers, Doug