Interesting.
If you read buffalo bore’s site they say on varying bore size for 38-55s which go from 377 to 381 thou
Heavy 38-55 Winchester Field Proven rifle and gun ammo. Maximum firepower bullets. Best ammunition for rifles and guns for sale. Buffalo Bore. Strictly big bore. Strictly Business.
www.buffalobore.com
“
375 BORE RIFLES
We use a bullet that is sized .377 inch. I am aware that 375 Winchester chambered rifles utilize a .375 inch bore. When fired, the .377 inch bullet will slug/size right down to .375 without raising pressures (we’ve tested the heck out of this) this is in part due to the construction of the bullet, but also due to our powder choice.
.381 BORE RIFLES
We are also aware that many old 38-55 rifles utilize a bore diameter of up to .381 inch, but most are between .377 and .380 inch. At 38,000 cup, there is enough pressure generated by this cartridge to cause that .377 diameter bullet to hit the rifling lands and slug up to the bore diameter (all the way up to .381 inch) and give wonderful accuracy.”
So you might find the Shellhouse bullet might “slug up”
Worth a try?
Scrummy