357 mag case gauge info


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nyc71
September 22, 2011, 08:27 AM
I recently got a Dillon 357 mag case gauge & was wondering if I can use the same case gauge for 38spl?
Thanks in advance.


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loadedround
September 22, 2011, 08:47 AM
Can't see why not since both cases head space on the rim. Give it a try and see.

cfullgraf
September 22, 2011, 09:31 AM
To my knowledge, handgun round case gauges are chamber gauges and are supposed to be cut to minimum chamber dimensions. They are meant for checking to see if a round will chamber without using the actual firearm.

So, checking for chambering a 38 Special round in a 357 Magnum gauge should work fine. Although, if you are using the 38 Specials rounds in a 38 Special firearm, i could see a slim potential of the round fitting the 357 magnum case gauge and not the firearm's chamber. Depending on how the case gauges are made, case length would be the issue. But, that is only a guess on my part.

For handguns, there is no better chamber gauge than the chamber of the firearm that the rounds will be used in. For safety, remove the barrel (semi-auto pistol) or cylinder (revolver) before using it as a gauge.

As an aside, case gauges for bottle neck cases are not chamber gauges for the most part. Most commercial gauges measure overall case length and shoulder position (headspace) only.

If you are looking for a chamber gauge for rifle cases, read the fine print on what the gauge does before you buy.

ranger335v
September 22, 2011, 10:00 AM
Well, it seems you have the gage already. Drop a .38 round in it and you will immediately notice that the end of the case is short of the end of the gage by about .1 inch. Other than that, it'll work fine.

nyc71
September 23, 2011, 12:09 AM
I do have the gauge & tested the 38 spl without issues, I was curios why would they make a 38 spl & 357 mag gauges if one works on both.


"They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety"- Benjamin Franklin

GLOOB
September 23, 2011, 12:32 AM
It's kinda difficult to catch a piece of long .38 special brass in a .357 gauge.

ranger335v
September 23, 2011, 09:49 AM
"...difficult to catch a piece of long .38 special brass in a .357 gauge. "

Yeah, meaning a 'drop in' case gage checks both diameter AND length, that's why they have that little step at the mouth end.

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