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View Full Version : Correct boolet size for Ruger GP100 .38/357?


hc18flyer
06-17-2018, 08:39 PM
I am making up some cast boolets for a friend and don't have access to his pistol to check the cylinder and barrel. These are fairly soft, plain based 10.6 bhn plinker boolets. Can I size them to .358? I was only going to get a hundred ready, till he gets a chance to check them against his revolver. Thanks, hc18flyer
nannyhammer
06-17-2018, 09:56 PM
I run .359 in mine without issue.
mike69
06-17-2018, 10:27 PM
Mine had .357 throats
Gene Perryman
06-18-2018, 10:00 AM
Mine has .358 cylinder throats, but I regularly shoot Valiant .357 RNFP coated lightly with LLA with NO problems and excellent accuracy.
Three-Fifty-Seven
06-18-2018, 10:53 AM
. ...
ReloaderFred
06-18-2018, 11:30 AM
I size all mine at .358" for shooting through over a dozen revolvers. I have no leading problems at all with that diameter.

Hope this helps.

Fred
ShooterAZ
06-18-2018, 11:59 AM
I also size all my 38/357 to .358. Good accuracy and no leading.
hc18flyer
06-18-2018, 01:52 PM
Sounds great, .358 it is. And Tac 1 lube, should work fine! I recently bought a used 6 cavity MP 360 640. My first 6 banger, really high production compared to my 2 cavities! hc18flyer
anothernewb
06-18-2018, 02:22 PM
both of mine have .357ish throats as well. coated bullets work okay, but regular cast, leads up.
There is a member on here - or who advertizes on here that apparently does a great job throating cylinders, as well as other machining. Although my mind is weak on a monday and I cannot remember who that is. I need to contact them myself as well and send him my cylinders.
Ed_Shot
06-18-2018, 03:57 PM
I also size all my 38/357 to .358. Good accuracy and no leading.

Me too....for GP100, Security Six, amd Blackhawk.
telebasher
06-18-2018, 06:07 PM
both of mine have .357ish throats as well. coated bullets work okay, but regular cast, leads up.
There is a member on here - or who advertizes on here that apparently does a great job throating cylinders, as well as other machining. Although my mind is weak on a monday and I cannot remember who that is. I need to contact them myself as well and send him my cylinders.

That would be Dougguy at Cylinderhone. com. He can fix you up !
EMC45
06-18-2018, 09:28 PM
I size all my .38/.357 bullet at .358. Across the board.
robertbank
06-18-2018, 10:38 PM
I size all mine at .358" for shooting through over a dozen revolvers. I have no leading problems at all with that diameter.

Hope this helps.

Fred

Me too! or should that be all in caps. LOL

Been a long hot day with temperatures in the back pits at our range over 38C - close to 100F, Drank lots of water and loved the heat.

Take Care

Bob
Minerat
06-18-2018, 11:13 PM
my GP 100 likes .358's too.