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saaman · September 13, 2005, 08:57 AM

My ASM Dragoons both measure .569 inch as near as I can read my dial caliper--they are first and third models. The center hole in the cylinder measures .572 on one and .571 on the other.

On both of these ASM Dragoons, the chambers came undersized and gave 6 or 7 inch groups at 20 yards. On one of them I reamed the chambers out, increasing them from about .448 to a uniform .450--now that pistol gives 2 to 3 inch groups at the same range. I used a dowel wrapped in sandpaper and reamed the front third of the chambers by hand, checking my progress frequently. When I have time, the other gun will get the same treatment.

September 13, 2005, 08:57 AM	#2
saaman Junior Member Join Date: September 13, 2005 Posts: 10	My ASM Dragoons both measure .569 inch as near as I can read my dial caliper--they are first and third models. The center hole in the cylinder measures .572 on one and .571 on the other. On both of these ASM Dragoons, the chambers came undersized and gave 6 or 7 inch groups at 20 yards. On one of them I reamed the chambers out, increasing them from about .448 to a uniform .450--now that pistol gives 2 to 3 inch groups at the same range. I used a dowel wrapped in sandpaper and reamed the front third of the chambers by hand, checking my progress frequently. When I have time, the other gun will get the same treatment.