I've seen other use unique and other pistol powders to fireform smaller cartridges with cream of wheat (cow). My question is, can I use a bit of trail boss or blue dot (my only pistol powders on hand) and stuff a bit of toilet paper? Thanks.
Forming 300 rum to a 35deg, wider case. Already do it with light loads and 165 or 180s, but would prefer to do it out in the shopwhat are you trying to fireform 300 RUM from or to
How about your charge of trail boss and then fill to the bottom of the neck and then take a candle and make a wax plug to the top of the neck? If it is not forming well keep adding more powder until you get the pressure up enough to form well? It takes more than you think. When forming improved 338 lapua I was using blem 250 bullets and I had to get up over 30 gr of unique to get a good shoulderStarted experimenting. I took it from 6gr trail boss with 2 patches pushed down in to the case. No effects on brass. Meaurements are the same but the primer pushed back due to headspace (normal).
Just tried 12gr with a square of toilet paper folded twice then rolled like a bullet into the case neck. It sticks out enough to keep the case against the boltface. Brass seems to be slighty affected, but not totally fireformed.
I found a reduced load of 18gr(min) trailboss for 300wm with 150gr bullets on the imr website. Seems I need more resistance
Sorry, I left out to use cream of wheatHow about your charge of trail boss and then fill to the bottom of the neck and then take a candle and make a wax plug to the top of the neck? If it is not forming well keep adding more powder until you get the pressure up enough to form well? It takes more than you think. When forming improved 338 lapua I was using blem 250 bullets and I had to get up over 30 gr of unique to get a good shoulder