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Both Lyman and RCBS make .452" and .454" but no .453" sizer die.
Both my NMBH and Bisley cylinder throats mike at .452" to .4525" which would typically mean I bump up to the next sizer die; .453".
What gives and should I run with the .454" or hope the 452" works?
Alan
Contact Buckshot. He'll make you one.
As long at your .452 die does, in fact, leave them at .452,you should be fine. We get little variations in size, depending on alloy. OR - just eat the cookie and get a .453... Mike
What size is the bore? My blackhawks bores were .453, .451 where the barrel threads into the frame and the throats were .4515. I opened the throats to .454 lapped the barrel so it was a uniform .453. I use a Lee mold which was small so I bugled it, the cast bullet runs .4555 by .4525. I then run them through a Lee .454 die. I use recluse 45/45/10 lube. I shoot about 1000+ rounds a month all cast and have NO leading problems.
captaint is correct. Run some boolits through your die and use a micrometer to check the as cast diameter and go from there. Every variation in alloy will give a different as cast diameter. I'll bet that simple little fact drives the die makers nuts with customers that don't understand it.
Rick
Problem solved. My water cooled 285 gr LBT WFN PB come out .453" when I use the .452" sizer die.
Alan
Cbrick, I've found that out to be true as well. Don't believe the number stamped on the die. There is usually some spring back when sizing. Measuring the bullets after sizing with a micrometer is the best way to check for size. Especially true when sizing 50 cal bullets as the sizing die walls are very thin to boot.
krems