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traded for a ruger vaquero .45 colt this week. both of my 45 moulds drop .454 bullets. my only sizing die is a .454. my chamber mouths measure .4525 which makes for more than a snug fit. is this combination safe to shoot ? should i wait to get a smaller sizing die ? i really would like to try this gun out tomorrow. but....
 

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My RV's both use .452 bullets. Know that the old Colts (around WWII) were using the .454 bullets.
 

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You are only talking about .0015" as the difference, which won't be an issue in the Ruger. I shoot my bullets as cast without sizing and have been doing so for years. I use Lee's liquid Alox and the whole process goes much faster. Plus, they shoot fine and without any signs of a pressure problem.
 

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with any of my molds that throw bullets big enough I try the bullet sized to .454 .452 and usually even try them unsized and tumblelubed. Should bother your gun at all. Some of mine even shoot better with them bigger.
 

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My .41 RBH prefers unsized which generally run around .4115 cast from WW. With commercial cat bullets sized at .410 I get less accuracy and excessive leading. Try them as is and see what happens.
 

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Sizing 45LC bullets

Dakota, I size all my 45LC bullets .454 for 4 RVaq. and have had excellent results. It sure won't hurt to give them a try and see what kind of accuracy you get and leading if any. I have not had any leading to speak of with mine. Omaha.
 
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