Bullet: 255 gr
Barnes Originals
(Barnes)
Diameter: 0.375"
Powder: IMR 3031 (Improved Military Rifle)
Starting Powder: 28.0 gr
Max Powder: 32.0 gr
Primer: WIN WLR
Case: Winchester Western
Trim Length: 2.075"
Cartridge Overall Length: 2.470"
Starting Velocity: 1,420
Starting Pressure:
Max Velocity: 1,623
Max Pressure:
Compressed
*Recommend crimping case mouth into cannelure groove. *Rifle manufacturers have used a variety of bore and groove diameters in .38-55 barrels over the years. Barnes makes both .375” (# 38/5510) and .377” (# 38/5520) bullets for this cartridge. If you need assistance choosing the correct bullet, check with a qualified gunsmith or the firearm manufacturer.
Barrel: 26" with 1:18" twist.
Source: https://www.barnesbullets.com/wp-content/uploads/2021/05/38-55WinchesterWeb.pdf
Printed from Shooter's Reference on 12/21/2024: