M-14 stocks - random accuracy thoughts

chopper 1

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Troy - Generation 1 - better design at ferrule - tighter locking.

Troy - Generation 2 - barrel band guide no longer tight in upper rail - stupid design move by Troy ?

JAE-100 G2 - Follows the original M14 design philosophy more than other aftermarket stocks.
The advantage over standard stocks - a standard bedding job by locking the receiver lugs to metal lug slides in the stock via allen screws pulling down the receiver into the stock.
The barrel tensioner seems to allow for adjustable ferrule lip pressure to achieve optimum barrel whip harmonics.
However - the receiver sitting on the top of the stock is not bedded - especially at the heel - very contrary to national match specs. (May not now be necessary?)
Since the trigger assembly no longer locks the receiver into the stock - it is loose in the stock - shimming was necessary for consistent lock time and harmonics. An obvious design flaw.

Sage and AKM Sage clone - The most standard bedding job according to match specs for the receiver, with the addition of free float from the op rod guide forward due to the op rod guide being bolted to the stock. The bolting has a positive effect on barrel whip.
The Sage also has a barrel tensioning screw at the front top for barrel whip. AKM can have one added.

Viron - Absolutely the best bearing system for barrel whip control. Allows the barrel to stretch when hot but not whip.
Great mechanical receiver heel clamp, but I found receiver bedding was still necessary.
Also - a lot of the coating material had to be dremeled and sanded for proper fit.

Accuracy shooting tests -
# 1 - Viron - same POI no matter how hot the barrel.

# 2 - Sage/AKM - always MOA with cheap ammo. Prints up to 2 inches lower with hot barrel - groups still MOA.

# 3 - G.I. fiberglass {or walnut} - epoxy bedded. Same low print when hot - slightly larger groups.

#4 - Troy - front end looseness showed on target - larger groups.

The SAGE/AKM's and epoxy bedded G.I.'s have shot 1/2 inch groups for me -
I have not been able to do that with the others.

As you can see - the JAE isnt rated - I have just finished accurizing a Springfield match rifle and mounted it in a JAE for someone. Going to test it on the weekend and rate the results.

What Chopper wants - a Sage stock with a metal Viron screw in from bottom receiver heel clamp, a JAE screw in from bottom receiver lug slides, a Sage 3 screw stock mounted op rod guide, and a Viron barrel bearing tensioning system. I wish. - If I had a machine shop ? Yeah !


Anyone else have test experiences ? Thoughts?

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Since the trigger assembly no longer locks the receiver into the stock - it is loose in the stock - shimming was necessary for consistent lock time and harmonics. An obvious design flaw.

How loose is "loose"? It seems to lock down pretty tight on my JAE G1.

I noticed on the G2 they include this as a standard accessory now:
-Trigger Pad Screws to adjust trigger group fit if loose
 
How loose is "loose"? It seems to lock down pretty tight on my JAE G1.

I noticed on the G2 they include this as a standard accessory now:
-Trigger Pad Screws to adjust trigger group fit if loose

It moves forward and back ward - seems to be some manufacturing tolerance slop between stocks - the stock came without pad screws.
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Apologies -

At the generation 1 - see the difference ?
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I was wrong - just got off the phone with an angel from JAE - she set me right - the 4 screw holes in front of the trigger assembly I thought were for stock anchor screws since they looked like all the rest of the same same screws, ARE the trigger assembly tightening screws. -She said its not in the nomenclature and they will fix it -

SAYAAAH.jpg

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wood

Any results using the BIG RED BIRCH. USGI ,but heavier.

All the wood and fiberglass stocks use the same bedding principle - and shoot similarly - the fatty match stocks have more consistent ferrule lip pressure because the forends are stiffer.
As below -
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CHOPPER,
great information regarding M14 stocks.
Thanks for sharing your experiences. Different perspectives that are well thought out and based on hard won personal experience, are always worth while listening to.

I am currently involved in the design of a new M14 Munimula Stock, which hopefully will combine all the good points and none of the bad points which we experienced M14 tweakers have discovered. I keep pushing for a NEW "clean sheet" design, with a rectangular op rod guide as part of the system, and the free floated barrel that goes with it, but market considerations will probably mean that we use the standard op rod guide, and a forearm tensioned barrel. We do however, intend to make the forearm tension ADJUSTABLE, for tuning.

If you were to have a clean sheet of all the features you like in a new M14 stock, what would your dream wish list look like??
thanks
LAZ 1
 
A pipe dream

CHOPPER,
great information regarding M14 stocks.
Thanks for sharing your experiences. Different perspectives that are well thought out and based on hard won personal experience, are always worth while listening to.

I am currently involved in the design of a new M14 Munimula Stock, which hopefully will combine all the good points and none of the bad points which we experienced M14 tweakers have discovered. I keep pushing for a NEW "clean sheet" design, with a rectangular op rod guide as part of the system, and the free floated barrel that goes with it, but market considerations will probably mean that we use the standard op rod guide, and a forearm tensioned barrel. We do however, intend to make the forearm tension ADJUSTABLE, for tuning.

If you were to have a clean sheet of all the features you like in a new M14 stock, what would your dream wish list look like??
thanks

LAZ 1
Thanx LAZ-
Exactly like the original G.I. walnut - LOL ! Its just plain booootiful !
But since it isnt practical, cheese grader ala Sage is good - Lots of lightening holes -

snapshotsofthepast_1883_46415917.jpg

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As you can see - the JAE isnt rated - I have just finished accurizing a Springfield match rifle and mounted it in a JAE for someone. Going to test it on the weekend and rate the results.

I meant to ask earlier, did you get a chance to test the JAE? (Using the newly discovered trigger tightening screws ;) ) I am looking forward to reading the review.

Incientally I just discovered these screws on my own stock. My trigger assembly locks in very tight without ever needing to adjust them, but it is good to know they are there.
 
Jae test

MOA with minimum front screw pressure - using Remington UMC ammo - no flyers . I am sure it is half MOA with match ammo - but I will prove it to myself.
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