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 Post subject: Fabarm choke performance
PostPosted: Mon Jun 04, 2018 11:56 pm 
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Anyone shooting the L4S, or a Fabarm with the same chokes, done any pattern testing? And any comments about performance on clay targets appreciated also, as I consider both to be important.
Thanks, Mike




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 Post subject: Re: Fabarm choke performance
PostPosted: Tue Jun 05, 2018 7:26 pm 
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I have not done any pattern testing yet.
I have shot sporting clays with the #2 short and the #5 medium.

I scored better and broke clays better with the #5 medium.

I am going to order a #4 light medium, I think it should be "just right"
They are great guns.

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 Post subject: Re: Fabarm choke performance
PostPosted: Wed Jun 06, 2018 12:15 pm 
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I have in left hand configuration an XLR5 Velocity FR. My experience suggests that the choke tubes shoot tighter than expected. I rarely move up to IC from my Skeet choke, unless I expect to encounter tournament grade targets. Most of the clubs I shoot set targets inside 40 yards and I have no problem breaking them with my Skeet choke.


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 Post subject: Re: Fabarm choke performance
PostPosted: Wed Jun 06, 2018 4:30 pm 
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MHWH wrote:
Anyone shooting the L4S, or a Fabarm with the same chokes, done any pattern testing?


Quite a bit, what are you looking for?

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 Post subject: Re: Fabarm choke performance
PostPosted: Sun Jun 10, 2018 12:45 am 
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What do you think of the quality of the patterns? I like as even a distribution as possible.
Meaning a skeet, or the 1 in Fabarm lingo for example, should have a nice even coverage at about 24 yards.

I like the breaks, but have not done all the work to pattern all of the chokes at different distances.

Thanks, Mike


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 Post subject: Re: Fabarm choke performance
PostPosted: Sun Jun 10, 2018 5:02 am 
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MHWH wrote:
What do you think of the quality of the patterns? I like as even a distribution as possible.
Meaning a skeet, or the 1 in Fabarm lingo for example, should have a nice even coverage at about 24 yards.

I like the breaks, but have not done all the work to pattern all of the chokes at different distances.

Thanks, Mike


There is no such thing as any .004 inch choke that produces any more mysteriously "even" patterns than any other.

From Warren Johnson:

Quote:
This explains why the normal or Gaussian (or DeMoivrian) distribution is everywhere: stock market fluctuations, weights of 12-year old boys, daily maximum temperatures, SAT scores, and yes, shot patterns. In the latter case, the travel of each pellet is independently and randomly influenced by numerous small effects: air turbulence, aerodynamic forces on pellet flat spots, variable choke forces, and many others.

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 Post subject: Re: Fabarm choke performance
PostPosted: Sun Jun 10, 2018 8:47 pm 
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Not sure where your reply was going? But, in any case, what do you think of the patterns you looked at with the Fabarm chokes you tested.


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 Post subject: Re: Fabarm choke performance
PostPosted: Sun Jun 10, 2018 11:17 pm 
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Yeah, I'm curious, too. With five sizes, you would think they match up with standard sizes like SK, IC, LM, M, F. Do they pattern like those, hotter core than other chokes, less core? All shoot the same?

I've considered getting one of these guns and wonder how the chokes measure up when used with basic, cheap ammo like Super Sport or Gun Club.


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 Post subject: Re: Fabarm choke performance
PostPosted: Sun Jun 10, 2018 11:26 pm 
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Image

This is with the Exis HP Extreme 9/10 choke into a 12 inch circle at 40 yards. I was using B & P F2 1-1/8 oz. #7-1/2 shotshells.

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 Post subject: Re: Fabarm choke performance
PostPosted: Mon Jun 11, 2018 12:58 am 
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Which ring is 12 inch, or the whole thing is only 12 inches?


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 Post subject: Re: Fabarm choke performance
PostPosted: Mon Jun 11, 2018 8:02 am 
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The entire target is 12 inches.

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 Post subject: Re: Fabarm choke performance
PostPosted: Mon Jun 11, 2018 8:54 am 
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DallasCMT wrote:
Yeah, I'm curious, too. With five sizes, you would think they match up with standard sizes like SK, IC, LM, M, F.


There are actually nine different constrictions.

Fabarm flush chokes (inner HP, as supplied on the L4S hunting line and the XLR5 Waterfowler) are interchangeable with the extended chokes. The Fabarm designation (#2, #5. #7, etc.) indicates actual constrictions in one-tenth of one millimeter, which is 0.0393701 inch. That's roughly .004 inch per increment of constriction. All constrictions are steel rated as well. The flush tubes are 82mm (3.23 inches) in length, whereas the current extended tubes are 97mm (3.82 inches) in length.


For sake of completeness, I'll mention the old style of 12 gauge Fabarm Exis extended tubes that are 92mm in overall length: those are interchangeable as well with both the flush and 97mm tubes. Fabarm USA currently offers a total of nine different constrictions, from 0/0 to 10/10. The only gap, if you want to call it that, is that there is no “3/10” choke: it jumps from #2 (Improved Cylinder) to #4 (Light Modified) in the line-up.

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 Post subject: Re: Fabarm choke performance
PostPosted: Mon Jun 11, 2018 10:47 pm 
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Great info there Randy, thank you.


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 Post subject: Re: Fabarm choke performance
PostPosted: Tue Jun 12, 2018 5:08 pm 
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Randy, why would you use only a 12” target to look at the pattern?

Also in the online catalog there is no #3 listed, nor is there a #6 listed as being available.

Thanks, Mike


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 Post subject: Re: Fabarm choke performance
PostPosted: Tue Jun 12, 2018 5:49 pm 
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RandyWakeman wrote:
Fabarm USA currently offers a total of nine different constrictions, from 0/0 to 10/10. The only gap, if you want to call it that, is that there is no “3/10” choke: it jumps from #2 (Improved Cylinder) to #4 (Light Modified) in the line-up.


I mentioned that there was no 3/10.

You're correct, there is no 6/10 either, so that makes 8 constrictions total in the standard line-up.

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 Post subject: Re: Fabarm choke performance
PostPosted: Tue Jun 12, 2018 10:09 pm 
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DallasCMT wrote:
Yeah, I'm curious, too. With five sizes, you would think they match up with standard sizes like SK, IC, LM, M, F.


The confusion come in when calling chokes "standard sizes." Nothing is standard in shotguns. SK, IC, LM, M, F, etc., are just designations.


Browning Choke Specs: Choke Tube Muzzle Dimensions + or - .0015

Image

Specifications for Krieghoff Factory Choke Tubes

12 Gauge - Available in standard Factory Steel and optional Titanium
00 = C = Cylinder = .000" constriction
0 = S = Skeet = .005" constriction
1 = IC = Improved Cylinder = .010" constriction
1+ = LM = Light Modified = .015" constriction
2 = M = Modified = .020" constriction
2+ = LIM = Light Improved Modified = .025" constriction
3 = IM = Improved Modified = .030" constriction
4 = F = Full = .035" constriction

Image

Image

Browning calls .030 in. constriction "Full" for an Invector Barrel. Krieghoff calls .035 inch "Full." Trulock uses .030 inch as full.

However, Browning's own specs have long had a .003 inch tolerance, so it is hard telling what you actually have unless you measure it. Some barrels are far, far worse. The new Browning DS Invector 12 gauge barrels are a mess.

Change the shell, you may have just changed everything. There is no substitute for patterning your gun with your ammo at the ranges you want to shoot at.



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