Manurhin MR73 and MR88 Bore Diameters?

Jasper Morris

Jasper Morris

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I'm a fan of the 148gr HBWC and wondering if the bore diameter on these is .355 or .357. Does anybody know for sure what the bore diameter is on the last batch of MR's that came into Canada?
 
Jasper Morris said:
I'm a fan of the 148gr HBWC and wondering if the bore diameter on these is .355 or .357. Does anybody know for sure what the bore diameter is on the last batch of MR's that came into Canada?
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Since the 9mm cylinder was discontinued (at serial 39200 on Mulhouse made revolvers) they switch bore diameter from .355 to .357.

The MR38 Match is still .355 though.
 
I've had good results with Campro HBWC, so I was hoping the bores are .357. Its interesting they kept the MR38 bore at .355 - but too much reloading commitment for me! Thanks for the info.
 
Makes a difference in how many shots you can take before the bore leads up and accuracy drops off. Obviously you would have to test individual gun and load but since I'm buying over the counter bullets (Campro .38 HBWC), I'm happy to learn that Manurhin went to .357 bore.
 
Leading is unlikely to be an issue with plated Campro bullets, which are in fact advertised as having extra-thick plating compared to other brands.
 
Brian James said:
The diameter of a bullet having gone through my MR88 is 0.358 with the odd measurement coming in at 0.3575 on my digital callipers.
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Thanks Brian, good to hear some measured numbers. I see from your posts, that you're a bullseye shooter. How does the accuracy of the MR88 compare to other .38 (or .32) revolvers?
 
I shoot my MR38 in competition and the MR88 was bought with the plan of shooting it in service revolver competitions. While both are good revolvers for true precision work the MR38/32 would be my choice without hesitation if I was looking for revolver. I’ve never handeled a Korth or Janz Janzrevoler dot .com

Other revolvers: Im shocked by the accuracy from my GP100 6” with half lug- but think I got lucky with it. The balance is nice and not as heavy as a full under-lug. S&W14-3 for the money/value it can’t be beat especially when you can upgrade the rear sight blade to a wider rear for less than $30.

When refer to accuracy it’s from factory ammo as reloads can be tailored to the gun.

I shoot a lot of SA action revolvers these days (Ruger Blackhawk 45ACP, Percussion: Rogers and Spencer reproduction and antiques,etc..).

A lot depends on what you want to do with your revolver.
 
Brian James said:
I shoot my MR38 in competition and the MR88 was bought with the plan of shooting it in service revolver competitions. While both are good revolvers for true precision work the MR38/32 would be my choice without hesitation if I was looking for revolver. I’ve never handeled a Korth or Janz Janzrevoler dot .com

Other revolvers: Im shocked by the accuracy from my GP100 6” with half lug- but think I got lucky with it. The balance is nice and not as heavy as a full under-lug. S&W14-3 for the money/value it can’t be beat especially when you can upgrade the rear sight blade to a wider rear for less than $30.

When refer to accuracy it’s from factory ammo as reloads can be tailored to the gun.

I shoot a lot of SA action revolvers these days (Ruger Blackhawk 45ACP, Percussion: Rogers and Spencer reproduction and antiques,etc..).

A lot depends on what you want to do with your revolver.
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Thanks for the reply Brian, you have some interesting comments that helped put the Manurhins in perspective.
I was looking at Manurhins because I was planning on downsizing my collection and wanted to treat myself to something "exclusive" with the funds. I shot S&W 52-1 in club level competition and have a S&W 14-2 and Colt OMM and unfortunately realized that I can't spend my way to better scores. I was asking about bore size because the 52 and OMM have tight bores and aren't very reliable as high round range guns. Did the BP thing and embarrassed to admit even went through an Elmer Keith phase too... so now just interested in non competition slow fire shooting 20 yard targets.

So based on you comments, I'll just use my S&W revolver and keep my eye out for the next batch of MR38's.

Cheers,
 
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