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View Full Version : .355 Groove and sizing to .358 - OK?



Rizzo
09-03-2018, 02:34 PM
My Henry 357 Mag rifle has a groove diameter of .355".
I slugged the barrel twice and measured with a micrometer.
I have a .358" sizing die.
Is that OK or should I size to .357"?
Thanks

Outpost75
09-03-2018, 03:00 PM
Load and shoot the largest diameter bullet which chambers without difficulty. Your .358 should be fine.

tazman
09-03-2018, 03:11 PM
If they fit in the chamber, they will be fine.

higgins
09-03-2018, 04:47 PM
Not exactly the same situation, but Colt revolvers typically have a .355 groove diameter and chamber mouths somewhere around .358. Seems to work for them.

Jniedbalski
09-03-2018, 06:00 PM
I always mostly use as cast. If it fits it shoots .in my 38’s . 359 fits fine. my 3 9mm .357 works but some brass in my 9’s don’t like .3585 a little tight in high point but fine in my star bm..In my 308 axis I can go .312 but is very snug so I size my bullets from two .314 molds to .311 and they fit good also . I have about 8 lee sizing dies but I hardly ever use them any more. I mostly shoot as cast

Rizzo
09-04-2018, 11:35 AM
Thanks folks, I appreciate the input.