Question

[Rough 'N Ready Rob]

I recently purchased a Marlin Cowboy Comp. in 45LC

  It looks to have micro grooved rifling, is that the way they came ?

Thanks  Rob

[Larsen E. Pettifogger, SASS #32933]

Does it say MicroGroove on the barrel?  If it does not it is not.

[Rough 'N Ready Rob]

2 minutes ago, Larsen E. Pettifogger, SASS #32933 said:

Does it say MicroGroove on the barrel?  If it does not it is not.

Nothing on the barrel, rifiing very fine, not like bullard on my 38 Marlin. 

[Eyesa Horg]

My Cowboy Competition in 45 does NOT have micro groove, new in early 2000s. Ellie's 357 does have micro groove.

The rifling is very shallow but not micro groove.

[Larsen E. Pettifogger, SASS #32933]

1 hour ago, Eyesa Horg said:

Ellie's 357 does have micro groove.

The rifling is very shallow but not micro groove.

?

 

My brandy new Ruger Marlin in .357 has eight grooves.  I have never seen a Cowboy Comp with a MicroGroove barrel.

Edited November 26, 2024 by Larsen E. Pettifogger, SASS #32933

[Eyesa Horg]

28 minutes ago, Larsen E. Pettifogger, SASS #32933 said:

?

 

My brandy new Ruger Marlin in .357 has eight grooves.  I have never seen a Cowboy Comp with a MicroGroove barrel.

Sorry bout that, Ellie's isn't a comp. Only my 45.

[Rough 'N Ready Rob]

2 hours ago, Eyesa Horg said:

My Cowboy Competition in 45 does NOT have micro groove, new in early 2000s. Ellie's 357 does have micro groove.

The rifling is very shallow but not micro groove.

Yes very shallow, almost like they are not there. Does it shoot lead OK ?

[Eyesa Horg]

3 minutes ago, Rough 'N Ready Rob said:

Yes very shallow, almost like they are not there. Does it shoot lead OK ?

Seems to, for CAS anyhow! I haven't put it on paper in 13 years!! Hit a clay bird on a stand at rifle target distance! Wish I could remember if it has always looked that way. 

[Eyesa Horg]

Maybe it looks shallow to me because I shoot muzzleloader quite a bit and the rifling is right in my face so to speak! But when I look down at my Marlin, I've wondered if it was getting shot(Otto said a bad word) out! But,there's folks that shoot more matches than I and don't seem to have an issue. I'm just gonna keep shootin her.

Edited November 26, 2024 by Eyesa Horg
Fixed fricken otto

[Reverend P. Babcock Chase]

If it ain't broke....

 

Rev. Chase

[Rough 'N Ready Rob]

Thanks for the replys.

  After looking at my Cowboy Comp in 38, I guess the rifling are about the same, very shallow.

Now that the rains have stopped around here, I guess I will have to get to the range and try it out.

  Rob

 

[Rough 'N Ready Rob]

5 minutes ago, Reverend P. Babcock Chase said:

If it ain't broke....

 

Rev. Chase

There is lever A and Lever B

[Larsen E. Pettifogger, SASS #32933]

The rifling on these guns is about .004" deep.  It is not shallow that is what it is supposed to be.

[Rough 'N Ready Rob]

5 hours ago, Larsen E. Pettifogger, SASS #32933 said:

The rifling on these guns is about .004" deep.  It is not shallow that is what it is supposed to be.

Looks more like .002"

[Garrison Joe, SASS #60708]

Count the number of grooves by carefully looking at the muzzle under good lighting.   12, sixteen or more grooves - that's Microgroove.   Five or six grooves - Ballard rifling.

 

Your barrel would have Microgroove marked on it if it had it, as mentioned above. 

 

Here's an article by Glen Fryxell (a very wise gun guy) on Marlin Microgroove barrels, see item 10 in this post:

https://www.marlinowners.com/threads/why-microgroove.216057/

 

good luck, GJ

[Rough 'N Ready Rob]

14 hours ago, Garrison Joe, SASS #60708 said:

Count the number of grooves by carefully looking at the muzzle under good lighting.   12, sixteen or more grooves - that's Microgroove.   Five or six grooves - Ballard rifling.

 

Your barrel would have Microgroove marked on it if it had it, as mentioned above. 

 

Here's an article by Glen Fryxell (a very wise gun guy) on Marlin Microgroove barrels, see item 10 in this post:

https://www.marlinowners.com/threads/why-microgroove.216057/

 

good luck, GJ

Great readings, thanks Rob

[Rough 'N Ready Rob]

Got it to the range, it shoots real good. I got some tune up goodies coming.🙂

  Rob

[Marauder SASS #13056]

Long ago and far far away, we shot Marlin's with microgroove barrels for SASS. It became THE SASS rifle.  (I have a photo of a rifle side match at EOT in 1999.  Out of over 20 shooters, there were 2 92's, one 73 and the rest were all Marlins.)  That was before folks figured out how to optimize 73 style rifles so the 73's were not quite as reliable and generally a little slower.

We did a lot of testing and once again after Marlin returned to the older "Ballard" style barrels.  Folks said the microgroove was better for jacketed bullets but would work okay for lead.
In the experimenting we found that at SASS velocities (and a little above) the microgroove shoot as well and usually better than the "standard" barrel.

[Boggus Deal #64218]

12 minutes ago, Marauder SASS #13056 said:

Long ago and far far away, we shot Marlin's with microgroove barrels for SASS. It became THE SASS rifle.  (I have a photo of a rifle side match at EOT in 1999.  Out of over 20 shooters, there were 2 92's, one 73 and the rest were all Marlins.)  That was before folks figured out how to optimize 73 style rifles so the 73's were not quite as reliable and generally a little slower.

We did a lot of testing and once again after Marlin returned to the older "Ballard" style barrels.  Folks said the microgroove was better for jacketed bullets but would work okay for lead.
In the experimenting we found that at SASS velocities (and a little above) the microgroove shoot as well and usually better than the "standard" barrel.

^^^^^ This! And besides, Marlin a quite a number of .22 LR rifles, even high end target rifles, with Micro-Groove rifling. Work pretty good with the nearly pure lead .22 ammo.