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.355 Or .356 For 38 Super?


BigDave

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Doesn anyone here know what the bore of Kart's 38 Super barrels are?

For you accuracy nuts out there - are most 38 Super barrels .355 or .356? Or, do people buy .355 barrels with unfinished chambers and ream to 38 Super?

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Dave,

Most barrels today are .355. It's alot easier that way. They can make a whole mess of .355 barrels and use them for all the 9mm variations.

Kart barrels come already chambered. I would suggest getting a 9mm and have your gunsmith ream it to 38 Super. I use a Kart in my open gun and have been very satisfied with the accuracy.

Some bullet makers claim to make a .356 bullet and you may find that it works better than a .355. The Hornady HAP was originally a .356 but they can't seem to make up their mind lately. I think Zero still carries one.

Kevin

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Bigdave

I have 2 .38 supers with Kart barrels in them. They are old (read 13 years old). They are .356 dia. I used .356 jacketed bullets and .357 or .358 lead bullets. Used to lead like crazy until I slugged it and got .357 dia. I heard that the dimensions were changed when .38 super got popular again. Just my experience.

Heebs

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  • 4 weeks later...
Dave,

Some bullet makers claim to make a .356 bullet and you may find that it works better than a .355. The Hornady HAP was originally a .356 but they can't seem to make up their mind lately.

Kevin

I had boxes of HAP bullets marked .356 and another marked .355 - but if you put a micrometer on them, they are exactly the same.

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