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45:
Nope - not a stupid question - and I think your question has been answered by the others before me, but in case not, here's a recap:
You can use a small rifle primer or a small pistol (regular or magnum) primer when using .45 Colt data in the .454 Casull cases. You do not want to use small pistol primers for true .454 Casull loads.
You can use any standard bullet designed for the .45 Colt for these loads.
BigDog454 pointed out that you need to be careful with small charges of fine grain powder. This is true. Because the .454 adds case capacity, I have never used anything less than the midrange .45 Colt load from the manual (I simply average the minimum and maximum load) in the .454 case.
The .45 Colt round is already very low pressure, so you will probably experience some fairly dirty loads. Powders (and cast bullet lubes) tend to be dirtier at lower pressures.
I have done this a bunch, mainly because it 's faster than changing the press set-up to the shorter Colt case with larger primer.
dogfood
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