9mm Range Officer - Bullet Diameter?

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9mm Range Officer - Bullet Diameter?

Post by beeser on Mon Dec 22, 2014 9:56 am

What bullet diameter is needed for the 9mm Range Officer?  I plan to order the 115 grain SWCBBs.  The standard size is .356" but they have optional sizes.

PS - Some of the writings on the Penn website are quite interesting, at least to me.  They even discuss loads for some of the bullets they manufacture.

beeser

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Re: 9mm Range Officer - Bullet Diameter?

Post by james r chapman on Mon Dec 22, 2014 11:36 am

I believe most of the Border Patrol guys shooting in the MPCPA here are using Springfield 1911's and using .357 dia bullets cast.

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Re: 9mm Range Officer - Bullet Diameter?

Post by beeser on Thu Dec 25, 2014 7:20 pm

I attempted to slug my barrel this afternoon and came up with 0.355".  Does this sound about right?  The method used was ...

Melted a swagged .45 bullet in a 9mm case.  Then used a bullet separator to remove the slug.  Drove the slug through the barrel from the muzzle end with a wood dowel.  Measurement is tricky but the maximum found was .355".

So, knowing this which bullet should I use; .355, .356 (standard), .357 or .358?

beeser

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Re: 9mm Range Officer - Bullet Diameter?

Post by james r chapman on Thu Dec 25, 2014 7:23 pm

Lead bullets are generally used .001-.002 over bore size, so a .357 lead bullet would be about right depending on the gun. Imho

Dardas will let u send a slugged bullet and measure it correctly for the gun and make recommendations.

james r chapman

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Re: 9mm Range Officer - Bullet Diameter?

Post by noylj on Sat Dec 27, 2014 1:51 am

Your RO is just the same as every other 9x19 pistol and will have the same variations in dimensions.
I would order 0.357" lead bullets myself. I find that my 9x19s all prefer somewhat larger bullets over nominal diameter (0.356-0.357" jacketed and 0.357-0.358" cast); however, each gun can be very individualistic in what it prefers.

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Re: 9mm Range Officer - Bullet Diameter?

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