Forming 40-50 BN brass

Discussion of BPCR loading techniques, SAFETY, Case Cleaning and Prep, Indexing, BP Choice, Primers, Wads, Compression, Drop Tubes, Vibration, Load Testing, etc.
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JoinedCOLON Fri Jan 30, 2009 5:22 pm

Forming 40-50 BN brass

Post by Ott » Sat Nov 28, 2009 7:52 am

I have a rolling block in the works, and am leaning towards the 40-50 Sharps BN. I already know that this round can be formed from 45-70 brass, but is is as simple as running the 45-70 brass through the sizing die, and then trimming to length, or is there more work involded.

I also like the 40-60 Maynard, but unfortunately my gunsmith doesn't have a reamer on hand. He does, however, have a 40-70 reamer. Do any of you gunsmith types know if this reamer can be run up short to form a 40-60 chamber?

PostsCOLON 39
JoinedCOLON Thu Dec 22, 2005 11:38 pm

Re: Forming 40-50 BN brass

Post by 38-72 » Sat Nov 28, 2009 10:26 am

I shoot a 40/50 BN. I use new brass and run them in to the sizing die (RCBS) then trim to length. Make sure the cases are well lubed. I shoot with smokeless powder and lead bullets. The 40/50 SS also makes a good BP round as do several others.

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JoinedCOLON Sun Nov 20, 2005 2:46 pm
LocationCOLON Central California

Re: Forming 40-50 BN brass

Post by Hiwall » Sun Nov 29, 2009 10:35 am

I would not let a "reamer on hand" determine the caliber of my future rifle. Reamers are very easy to rent and are not expensive. You get a freshly sharpened and checked reamer for about $35.00 rent, for three days.
A small enough cost for a rifle you will love and have already spent many $$$$ to build.
Google "reamers for rent" and you will find some nice people to deal with.
tom patton