Hi Tom--- great to hear from you. You are always such a great spource of solid advice. Hope you won't mind some questions>
When you say your barrel slugs to 378... i assume you mean the widest diameter lan to lan)..as the rifling i have is six lans/grooves so it's easy to measure.
The groove to groove diameter is the widest measurement and mine measures .378 - measured from a pure lead slug at about 2-3 inches in front of the chamber leade, basically in the throat.
is the lead mix you use the same as your henry? i have a large amount of "Hardball" from Midway 6% antimoney, 92% pure and 2% tin, that shoots great in my 44-40 Uberti henry with 29g 3f and spg
i would like to use the same lead
Yes, same mix I use with the Henry. If sized .001-.002 over groove diameter, it should be OK. Mine is not as hard as hardball - 50/50 mix is about 8 BHN (or thereabouts). Hardball is about 14-16 BHN, and linotype is around 18-22 BHN.
re the mold..Lyman 575248...is it just lucky that bullets come out 379+ so you can size down to 379? seems big for a 575 mold
Lyman 375248. Originally the bullets dropped .376 and would keyhole. I opened up the mould a bit with aluminum tape (aka 'beagling'). They now drop out around .380-ish, just enough for me to size them to .379 and ensure they are concentric/round.
the starline brass does not need to be cut, correct??
Starline offers two lenths of 38-55 brass. 2.080" and 2.125". My chamber was the longer and the 2.125" brass chambers fine, no trimming/cutting needed. It also will shoot the 2.08" fine, but I was getting a ring of lube crud building up in the throat, and after about 10 rounds accuracy would drop off. With the longer brass, it shoots fine for 20+ rounds before feel the need to scrub it out, but I no longer have any crud ring build up other than normal BP fouling.
that's it for now
yours (and many thanks)
mike arthur
hampton horse artillery, 267PT
843 412-1992
charleston, south carolina
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