This is a strange one to me....
I have a new S&W Model 69 with 4.2 barrel and have been testing my handloads with it and of course own a SBH with 7.5 inch barrel that I shoot same loads in.
The mystery is when shooting the Missouri Bullets 240 or 300 gr. coated bullets thru the M69 they leave an ugly trail of coating and lead after 10 rounds.
When shot thru my Ruger SBH the bore is as clean as can be after 12 rounds.
The cylinder throats on the SBH are .432 and the throats on the SW M-69 are .431 with the bullets measuring .4305
The bore of the SW M-69 appears to be smooth and nice and shiny when clean AND shoot my 230 gr. lead SWC with gas check bullets very clean with little if any leading. Plated bullets shoot fine also.
These are mild loads shot with 9 gr. of Unique powder and must mention the 230 gr. SWC/GC bullets are 11-12 BHN sourced from Matt's Bullets. Also the coated Missouri Bullets leaving the lead shoot VERY well.
Of course shooting several jacketed bullets thru the M69 will clean out the bore at the range but just wonder why the these coated bullets don't shoot clean only in my M69.
I have a new S&W Model 69 with 4.2 barrel and have been testing my handloads with it and of course own a SBH with 7.5 inch barrel that I shoot same loads in.
The mystery is when shooting the Missouri Bullets 240 or 300 gr. coated bullets thru the M69 they leave an ugly trail of coating and lead after 10 rounds.
When shot thru my Ruger SBH the bore is as clean as can be after 12 rounds.
The cylinder throats on the SBH are .432 and the throats on the SW M-69 are .431 with the bullets measuring .4305
The bore of the SW M-69 appears to be smooth and nice and shiny when clean AND shoot my 230 gr. lead SWC with gas check bullets very clean with little if any leading. Plated bullets shoot fine also.
These are mild loads shot with 9 gr. of Unique powder and must mention the 230 gr. SWC/GC bullets are 11-12 BHN sourced from Matt's Bullets. Also the coated Missouri Bullets leaving the lead shoot VERY well.
Of course shooting several jacketed bullets thru the M69 will clean out the bore at the range but just wonder why the these coated bullets don't shoot clean only in my M69.