Recently purchased a model 544 in 44-40. Really want to roll some out and make some noise. I have some O/T laser cast 200 grainers in .430 from my 44 special that I could use, but haven't slugged the bore for a correct diameter. Are the 544's running a standard .429" groove diameter, allowing me to use these, or are they closer to the old .427". The guns were made for one year in 1986. Thanks.

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Todd