RUGER MK-IV TGT 10B - Bullseye/CMP Legal?

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RUGER MK-IV TGT 10B - Bullseye/CMP Legal? Empty RUGER MK-IV TGT 10B - Bullseye/CMP Legal?

Post by Bren on Thu May 21, 2020 7:05 am

I keep look at the Ruger MK IV Target 10B with 10" barrel and thinking about how all that extra sight radius might help with iron sight shooting.

Ruger says it has a 10" barrel and Bullseye and CMP rules say "Barrel length may not exceed 10 inches (including the cylinder on revolvers)."  But, with different ways of measuring barrels and manufacturers tending to round numbers and such, does anybody know if a Ruger 10 inch barrel is the same as a CMP 10 inch barrel?

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Post by STEVE SAMELAK on Thu May 21, 2020 8:21 am

I'm frequently confused, but I think they measure autos from the back of the chamber to the muzzle.
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Post by cdrt on Thu May 21, 2020 8:42 am

Semi-auto pistols are measured from the front of the chamber (breach face), not the back.

Bren, you are over thinking this. If Ruger says it is a ten inch barrel, it is a ten inch barrel. We all go by what the manufacturer says when checking pistols.

I measured the 5 1/2 inch barrel on my HS Victor, it is a hair under 5 1/2 from the muzzle to the front of the breach face.
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Post by STEVE SAMELAK on Thu May 21, 2020 8:50 am

Possibly splitting hairs, but isn't the back of the chamber the mating surface for the breach face?
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Post by cdrt on Thu May 21, 2020 8:56 am

STEVE SAMELAK wrote:Possibly splitting hairs, but isn't the back of the chamber the mating surface for the breach face?
Yeah, had  senior moment.  Happens to the best of us.
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Post by CR10X on Thu May 21, 2020 8:59 am

Actually, as produced its not legal for CMP (Distinguished/Service or Match Pistol) or NRA. 

For NRA and CMP the sight radius is too long, over 10 inches.  (Check out the CMP General Rules for .22 D Pistols 4.1.6 d; General Rules for Match Pistols 4.2.1 c; and NRA .22 3.4)

You have to read all the rules.....


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Post by Olde Pilot on Thu May 21, 2020 9:05 am

Regardless of the rules: Unless your name is Bickar or Rhodes or have HM after your name, the LONG sight radius will drive you bananas.

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Post by aub1957 on Thu May 21, 2020 1:27 pm

22 Rimfire Pistols.  Rule 4.1.6 (d):

"The total sight radius may not be more than 10.0 inches as measured from the rear surface of the rear sight to the highest point of the front sight."


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Post by Wobbley on Thu May 21, 2020 1:48 pm

aub1957 wrote:Legal 22 Rimfire Pistols.  Rule 6.4 defines the pistols that are legal for this match:

"The sight radius may not exceed 10 inches as measured from the rear surface of the rear sight to the highest point of the front sight."

Which is why one of the older High Standard “Spacegun” pistols with a 10 inch barrel had the rear sight dovetailed into the rear of the barrel.RUGER MK-IV TGT 10B - Bullseye/CMP Legal? 60a0f610
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Post by CR10X on Thu May 21, 2020 3:43 pm

 Rule 6.4 defines the pistols that are legal for this match:

?

Rule 6.4 in the NRA Precision Pistol Rules (2020) is for Range Standards - Distance

Rule 6.4 in the CMP Pistol Competition Rules (2020) is for Target Maintenance

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Post by aub1957 on Thu May 21, 2020 5:49 pm

The correct spot to look in the CMP Pistol Competition Rule Book (2020) is 4.1.6 (d)

Same as above: 10 inches rear surface of rear sight to highest point of front sight.

Pardon my error.

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Post by Bren on Sat May 23, 2020 11:21 am

CR10X wrote:Actually, as produced its not legal for CMP (Distinguished/Service or Match Pistol) or NRA. 

For NRA and CMP the sight radius is too long, over 10 inches.  (Check out the CMP General Rules for .22 D Pistols 4.1.6 d; General Rules for Match Pistols 4.2.1 c; and NRA .22 3.4)

You have to read all the rules.....
Thanks; that settles it.  No MK IV 10B for me.
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