.429 vs .430 dia for jacketed .44 mag?


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jerrard
August 10, 2010, 07:53 PM
Its been years since I last reloaded, but I believe I always used .429
dia for jacketed bullets in Smith Mod 29. Looking to buy bullets I
see many listed at .430. Is this .001 going to make any difference?
Are .430 for other cal like 444 marlin etc?

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buck460XVR
August 10, 2010, 08:14 PM
The Hornady bullets I use for .44 mag are .430 in diameter. So are SOME of the Remingtons. The Speer and Noslers are .429. They are all 240 gr and all shoot well. Most print close enough to each other with the same loading that I cant tell the difference.......or maybe it's just me.

ranger335v
August 10, 2010, 10:05 PM
" Is this .001 going to make any difference?"

No.

MichaelK
August 11, 2010, 12:09 PM
Had read somewhere else that Marlins tended to have larger chambers and barrel diameters than revolvers. Soooo, I bought .430" jacketed bullets and developed a very well performing handload that was leaving the barrel at about 1800+fps, was accurate, and used it to take last season's deer.

I subsequently finally got around to slugging my barrel and discovered that it was indeed 0.429" which is considered spec. Don't think the bullet, the gun, or the deer ever noticed the difference!

Robert Palermo /Penn Bullets
August 11, 2010, 02:19 PM
SAMMI changed the spec for nominal diameter for the .44 from .429 to .430 quite some time ago. Most of this was due to the oversized Ruger handguns that came onto the market.
.430 is fine for Jacketed and we run .431 for cast for most 44's. with an occasional .432 for those with oversized cylinder throats.

jerrard
August 11, 2010, 03:02 PM
Thanks for info guys!

Jimmy10mm
August 11, 2010, 03:24 PM
Years ago I slugged the bore of a couple of S&W 44s and a Colt SAANF in 44spl. The S&W were 430 and the Colt was 427. For a time I had a Colt New Service in 44spl and it was 428. I have sizing dies for 429 and 430. Shot factory stuff through all of 'em and reloads with no issues so they must be within tolerance.

Oceans
August 11, 2010, 04:28 PM
The cylinder throats in my 629-6(lock version) are .428 and the bore is .429. The cylinder throats on my 1961 M-29 no dash are 431 and the bore is .429

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