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ysrracer

I gave my S&W 9mm 929 a "circumcision" :)

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Doesn't pay much, but you get to keep the tips...

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Here I am making all my barrels longer, and people be chopping off inches!

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I cut the threaded nub off and recrowned mine

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Why would you do this? I mean, OK, I know why ... to make it shorter, but was the inch making that much different?

 

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6 minutes ago, Vincerama said:

Why would you do this? I mean, OK, I know why ... to make it shorter, but was the inch making that much different?

 

 

Size matters :)

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I've been tempted more than once to get rid of the "nub" and taper back the bottom lug but just haven't wanted to risk ruining the crown.  Is it very difficult to do it right??

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7 hours ago, alecmc said:

Here I am making all my barrels longer, and people be chopping off inches!

I was thinking the exact same thing. How much did we spend over the years to get basically a stock 929 and some people are cutting them down. 

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Briwwnells sells a crowning toland it works well

Piloted for good alignment

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Well done! 5" is enough in semiauto, in revo 4" or something more get the same performances.

Plus, 4" is OK for IDPA

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I chrono'd it with factory 9mm ammo before and after cutting the barrel. There's virtually no difference in velocity.

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Factory Federal 124

 

6.5" barrel

 

Name: Fed 9mm Factory 124 FMJ

Notes: S&W 929 6.5" barrel

Shots: 7 Average: 1071 ft/s

SD: 12 ft/s

Min: 1051 ft/s

Max: 1095 ft/s

Spread: 44 ft/s

Power Factor Average: 132

Power Factor Low: 130

Power Factor High: 135

Weight: 124.0 gr.

 

5" barrel

 

Name: Fed 9mm Factory 124 FMJ

Notes: S&W 929 5" barrel

Shots: 4 Average: 1065 ft/s

SD: 9 ft/s

Min: 1052 ft/s

Max: 1076 ft/s

Spread: 24 ft/s

Power Factor Average: 132

Power Factor Low: 130

Power Factor High: 133 

Weight: 124.0 gr.

Edited by ysrracer

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Since there's so little difference in velocity I'm wondering if S&W's purpose for the longer barrel was more for an increased sight radius. I seem to recall Rob shooting 9mm out of his 5" Performance Center 627-4 (chambered for 38 Super) and making power factor quite easily.

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My understanding, and I could be wrong, is both the 627 and 929 have a .357 barrel. 

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15 minutes ago, ysrracer said:

My understanding, and I could be wrong, is both the 627 and 929 have a .357 barrel. 

That is what has been said. I can’t remember if somebody actually slugged the barrel when they first came out. I think there is an earlier discussion on this some where in the forums. I know a friend of mine has the 627 in 38 super and the barrel is .357. 

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I actually had a .356 barrel put on mine and .358 bullets still group the best. 

A3B443C2-196E-4497-9CB9-0CB4FD8BA1AD.jpeg

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You guys inspired me..  That stupid nub is gone!!!  Just waiting for the 11deg chamfer tool to come in...

1BF0FD53-0E30-40F3-94E7-7AF13E0F410A.jpeg

72C294E8-14BE-4FFB-82A1-ECF4E8E842FA.jpeg

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6 hours ago, revoman said:

That is what has been said. I can’t remember if somebody actually slugged the barrel when they first came out. I think there is an earlier discussion on this some where in the forums. I know a friend of mine has the 627 in 38 super and the barrel is .357. 

I think most are. Mine is .358. Kind of a dick move if you ask me.

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1 hour ago, NoSteel said:

You guys inspired me..  That stupid nub is gone!!!  Just waiting for the 11deg chamfer tool to come in...

1BF0FD53-0E30-40F3-94E7-7AF13E0F410A.jpeg

72C294E8-14BE-4FFB-82A1-ECF4E8E842FA.jpeg

 

I like it. I wonder if you could loctite red a stainless steel bolt and then bring it down flush to hide the hole. 

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On 2/13/2020 at 10:41 AM, Toolguy said:

Doesn't pay much, but you get to keep the tips...

 

As heard from the prostitute at the leper colony. 

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48 minutes ago, IHAVEGAS said:

 

I like it. I wonder if you could loctite red a stainless steel bolt and then bring it down flush to hide the hole. 

That's the plan but you'll note there is a slight chamfer on the opening before the threads start,  I have to mill one up that will leave enough to fill the void.  Plan to angle the lug back a little also....

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