Hello, M.T. Marfield!
My '92 Marlin has a somewhat rough bore as well and a bit of a barely noticeable bulge about 4" in from the muzzle. Glad to hear that yours shoots well. After some experimentation, I decided to use as fired cases for reloading. That means I need a bullet with a heel diameter of .305-.306". Having single cavity 311244 and 311245 molds (both drop bullets around 94 grs. in w.w.+ 2% tin) I decided to use those two bullets, the 311244 for smokeless and the 311245 for black powder since it has 1 more lube groove. Also, testing of the Hornady 90 SWC has shown good promise as well with smokeless.
I found that, if, after lubing in a .311" die, I ran the bullets into a .301" Lyman H&I die, it would taper the rear band to be a push fit into the fired case.
So far, that has worked very well. WIth the Hornady I push them nose first through a Lee .311" die then into the .301" die.
I have tried several different smokeless powders to give velocities = to the original b.p. cataloged velocity of 1,070 f.p.s. So far, some old SR80 and H4227 seem to give the best accuracy.
When it comes to b.p. in a lever action rifle, Swiss gives the best performance. That is, many more repeated shots before accuracy starts to deteriorate. Swiss 3F has worked very well.
The following data was for the .32 Long Colt, rim fire. Center fire cartridges would give similar velocities.
1932 Shooters Bible
Black Powder - 90 gr. bullet - 1,075 f.p.s.
1941 Winchester Ammunition Guide
1954 Western Handbook
Smokeless Powder - 90 gr. bullet - 945 f.p.s.
100 yard vlocity......................... - 850 f.p.s.
mid range trajectory .....................5.3"
POWDERS:
Historically speaking, the earliest smokeless loading used 4 grs. of DuPont No. 2 bulk smokeless which was also used in many other cartridges up to and including the .44-40 in the late 1800’s - early 1900’s.
Later powders shown in early – mid 1900 reloading manuals were for the now obsolete RSQ, DuPont No.5 and SR80.
The earliest reference that I can find to a smokeless powder that is still in production today is in the 1903 Ideal handbook. Laflin & Rand had a chart in this handbook which recommended 2.0 grs. of Bullseye. A 1927 Hercules Powder Pamphlet also shows the same 2.0 gr. charge of Bullseye for the .32 Long Colt. Dissected U.M.C., REM-UMC and R-P factory cartridges contained 2.0 grs. of what appears to be Bullseye.
L to R Hornady 90 Gr. SWC / 311244 / 311245 / 311245 b.p.
See
http://shootersforum.com/showthread.htm?t=57159 for another thread on the .32 Colt.
w30wcf