Shiloh chambers

[JWT]

I spoke to Kirk at Siloh on Friday and he recommended the standard chamber with the 7 degree lead modification and removal of the stop. He told me that this was a good chamber for paper patch but would also shoot grease groove well.

[ian45662]

I’m probably over thinking it but I have been really beating myself up over this one simply thing. There are some people who are shooting extremely well with the 45 degree lead.


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[flatsguide]

That looks like the chamber in my stock .45-70 Browning bpcr. 20-25 degrees ?
Richard

[Gunlaker]

The Browning chamber is quite different than the Shiloh one. The Browning is something like a 12.5 degree taper from the outside of the case mouth all the way into the rifling. The Shiloh is 45 degrees into a .459" diameter freebore that is 0.050" long, and then a 2.5 degree taper into the rifling.

They both shoot quite well though

Chris.

[flatsguide]

My Browning .45-70 BPCR chamber and the latest target of same

[ian45662]

They do look similar but I think the lead in mine looks like it’s just a tad bit longer or is that an optical illusion ? I think the 45 degree lead is about .010 long. I am having a reamer made with a 45 degree lead in it for my cpa. It will be .481 in the mouth so that I can shoot groove diameter bullets in it also.


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[BrentD]

flatsguide, looks like you have it working. I can't imagine how that target would look if you upped your powder to the magical 82 grs. ...

Just kidding...

[Chill Wills]

Flatsguide - my Browning BPCR 45-70 chamber is long and will take 2,135" brass and should for best accuracy. Now that you have cast your chamber, can you say how long yours is?

[Gunlaker]

My Browning BPCR also had a very long chamber. I used Starline .45-90 trimmed to length.

Chris.

[flatsguide]

Chill my chamber is 2.110 long.it is rare that I get a paper ring.i trim my brass to 2.115. Too bad there is such a discrepancy on chamber length, but not as bad as the off center chambers in the Browning .40-65 ‘s. As a side note when I got my rifle I wanted to get thicker brass in the neck area for pp’ing. So I purchased samples of longer brass cases, miking the wall thickness at the same height as the .45-70 brass the thickness was the same as the .45-70 cases. This was in Starline brass. It may be thicker in other manufacturers brass.
Regards, Richard

[Chill Wills]

Thanks. I am glad you have a good one. I would have thought or hoped they would have used the same spec reamers. Odd that (too) long case mouth chamber in mine and some others. I wonder (guessing here) if in production they use a set of reamers to do each chamber? A rim reamer, a body reamer and throat reamer??? And just went farther than spec.? What I would have guessed was a one piece rougher and a finisher.

Anyway, it looks like you are well on you way to great accuracy. You will be winning every match