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Old July 21, 2018, 11:29 PM   #1
jski
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Who’s got the correct Makarov bullet diameter?

SAAMI says the correct 9x18 bullet diameter is .365”.
Hornady says .365”
Speer says .364”
Sierra says .363”
The Poles say .3635”
The Ukrainians say .364”
Not sure what the Russians say?
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Old July 22, 2018, 12:09 AM   #2
Aguila Blanca
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SAAMI specs do not say that .365" is "the" correct bullet diameter. It's .365" with a minus tolerance of .0010", which means anything between .364" and .365" inches is "correct" (within specification).

But SAAMI is an American organization, that establishes standards for American sporting arms and ammunition manufacturers. Obviously, the 9mm Makarov is a European design, and the original specification was in the metric system. The SAAMI cartridge drawings include metric equivalents, but we don't know if the metric values were converted from inches, or if the inch values were converted from metric values.

.363" is out of spec according to SAAMI. I'm surprised that Sierra would use that as their value.
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Old July 22, 2018, 02:30 AM   #3
jski
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This may be an older Sierra product but it's .363" in diameter.

BTW, Lyman's manual shows .363".

PS> Is someone colluding with the Russians here? Those crafty devils!
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Old July 22, 2018, 03:27 AM   #4
Aguila Blanca
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The definitive answer is to slug your barrel and use a bullet that's .001" larger than the grooves. However ... I know what a Makarov is, but I've never seen one up close and personal. Does the 9mm Mak use polygonal rifling?
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Old July 22, 2018, 07:16 AM   #5
74A95
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Since it is a European cartridge, CIP has the 'official' specs, which indicate the bullet diameter for the 9mm Makarov is 9.27mm, or 0.365". You can find their information at this website:

http://www.cip-bobp.org/homologation...-en-page23.pdf
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Old July 22, 2018, 07:18 AM   #6
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The bores vary quite a bit , manufacturing tolerances stack and there is really no way to predict what your guns bore diameter is.
It's barrel slugging time . After that you will know exactly what you have and the bullet size needed .
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Old July 22, 2018, 12:45 PM   #7
jski
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I recently acquired a Polish P-64. So, naturally I bought Polish ammo made by Mesko which is a 1st ammo manufacturer. They supply the Polish military. Seemed reasonable that the Poles would known best what works with their gun. Now that’s the .3635” ammo.
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Old July 22, 2018, 04:00 PM   #8
Marco Califo
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"Makarov is actually a 9.22mm, using an odd-sized .363" diameter bullet. Having been manufactured in a large number of Communist Bloc countries, bore sizes running from .362" to .366" may be encountered"
Sierra's latest Makarov entry.
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Old July 22, 2018, 07:40 PM   #9
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Lyman say use .363 bullet also
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Old July 23, 2018, 01:54 PM   #10
T. O'Heir
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Slug your barrel.
"...Sierra says..." Kind of moot since they don't make any bullet that's even close to that. Don't appear to be any .363" bullets made either.
.364" and .365", cast and jacketed, are the easiest to come by.
"...what works with their gun..." Isn't their pistol. And .3635" is considered to be .364".
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Old July 23, 2018, 10:18 PM   #11
Marco Califo
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Sierra #8200 and #8210 are/were .363".
Hornady, Speer and Berrys all make Mak bullets.
https://www.midwayusa.com/product/21...ket-box-of-100
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