Sportsdad60
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I picked up a new (never fired, 1982) Winchester 94 for a good price in 38-55. I'm convinced I am now starting to look at firearms in strange calibers just for the challenge of reloading them. 
Do I care if anyone cares about this post? No I don't, but now it's part of Internet Bullet Science should anyone else want to reload for .38-55. There was not a lot of data for 38-55 during my research. So I am offering up more.
This is my experience and mine alone. You're mileage may vary. Load at your own risk.
I went with my trusty AA 5744 smokeless powder to start. I Hate the cost of 5744 but I love the accuracy with 405gr bullet/26 gr of 5744 in a 45-70 loads!
I Started with Lyman's suggestion (validated by other load data) with min load of 20 gr. Max load was 23 gr but I stopped at 22 gr.
Bullet:
Missouri
#1 Ballard - Hi-Tek
.379 Diameter
245 Grain RNFP
Brinell 18
For The High Plains
Hi-Tek 2-Extreme Coating
Brass:
38-55 Starline "short" (2.080)
Primer:
CCI Lg Mag Primer
Took about 1 hr min to prep and set up the new RCBS 38-55 dies.
Checked the first 6 rounds for loading ability and cycling action (facing the Game Preserve just in case a primer went off and shot something, hmmm, like an elk or deer.)
Observations:
Walls are extremely thin. One must not use the same primed brass starter more than 3 times over when doing a 'final powder measure' on the AP press as the case edge gets 'loose'. I use a small glass dish to cycle the Powder drop but do one final check with the casing....cannot do it more than three cycles. This brass is essentially "REALLY long .357 magnum straight wall"
Sexy looking round next to the .45-70
Sort of a sister on a diet! It's very similar to .30-30 but with no neck down, and a bullet weight much heavier, so much that when it arrives at the intended destination it will say "Hello, I'm here a little slower the 30-30, but I'm going to knock you on your butt".
Coated bullets seat nicely although there is a slight case buldging due to .379 bullet. I think .378 cast is going to be perfect when I get to black powder for this caliber.
Racked and shacked smoothly on the Winchester action although I will have to grow my right thumb nail about 1/8 of an inch longer when reloading.
Pic 1:
Bullet left, first dummy load, bullet seated too deep, too much crimp.
Bullet right, 2nd attempt, seated good, and a kiss crimp.(My definition of a Kiss Crimp is "Bullet doesn't move when dropped from 2 feet or push with 25 lbs")
Pic 2:
Comparison to .50 caliber and .45-70 with 500 gr bullet.
Pic 3:
First 6 (capacity of mag) in lowest charge.
Pic 4: 21 gr and 22 gr. I made more of the 22 gr based on my gut feeling and reading other's recipes and range reports (the few and far between they are for this old caliber)
Pic 5: 38/55 245 gr bullet next to a 500 gr 45/70 bullet.

Do I care if anyone cares about this post? No I don't, but now it's part of Internet Bullet Science should anyone else want to reload for .38-55. There was not a lot of data for 38-55 during my research. So I am offering up more.
This is my experience and mine alone. You're mileage may vary. Load at your own risk.

I went with my trusty AA 5744 smokeless powder to start. I Hate the cost of 5744 but I love the accuracy with 405gr bullet/26 gr of 5744 in a 45-70 loads!
I Started with Lyman's suggestion (validated by other load data) with min load of 20 gr. Max load was 23 gr but I stopped at 22 gr.
Bullet:
Missouri
#1 Ballard - Hi-Tek
.379 Diameter
245 Grain RNFP
Brinell 18
For The High Plains
Hi-Tek 2-Extreme Coating
Brass:
38-55 Starline "short" (2.080)
Primer:
CCI Lg Mag Primer
Took about 1 hr min to prep and set up the new RCBS 38-55 dies.
Checked the first 6 rounds for loading ability and cycling action (facing the Game Preserve just in case a primer went off and shot something, hmmm, like an elk or deer.)
Observations:
Walls are extremely thin. One must not use the same primed brass starter more than 3 times over when doing a 'final powder measure' on the AP press as the case edge gets 'loose'. I use a small glass dish to cycle the Powder drop but do one final check with the casing....cannot do it more than three cycles. This brass is essentially "REALLY long .357 magnum straight wall"

Sexy looking round next to the .45-70

Coated bullets seat nicely although there is a slight case buldging due to .379 bullet. I think .378 cast is going to be perfect when I get to black powder for this caliber.
Racked and shacked smoothly on the Winchester action although I will have to grow my right thumb nail about 1/8 of an inch longer when reloading.

Pic 1:
Bullet left, first dummy load, bullet seated too deep, too much crimp.
Bullet right, 2nd attempt, seated good, and a kiss crimp.(My definition of a Kiss Crimp is "Bullet doesn't move when dropped from 2 feet or push with 25 lbs")
Pic 2:
Comparison to .50 caliber and .45-70 with 500 gr bullet.
Pic 3:
First 6 (capacity of mag) in lowest charge.
Pic 4: 21 gr and 22 gr. I made more of the 22 gr based on my gut feeling and reading other's recipes and range reports (the few and far between they are for this old caliber)
Pic 5: 38/55 245 gr bullet next to a 500 gr 45/70 bullet.





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