double trigger & LOP

qcdude

qcdude

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hello,
I've got a 12ga Stoeger Coach shotgun with walnut stock. It tends to shoot slightly leftward.
I'm a regular right handed shooter.
I measured the LOP. It is 35cm from the rear trigger and 37cm from the front one. My single trigger shotguns have 37...37.5cm LOP and they shoot straight. If I understand it right, shorter LOP can be the reason why my coach shotgun tends to shoot leftward. But how do I suppose to measure the LOP for double trigger?
I think to add a 10mm spacer under the butt stock. What do you think?..
Worst case scenario, is it a complicated process to increase the cast of wooden stock? Is there any sort of manual on how to do it?
 
I'd let several people try to pattern it. It maybe you or it maybe the gun is not regulated correctly. There's ways to shift point of impact with stock alterations and even shaving the muzzles but I'd definitely test the gun first
 
9.3mauser said:
Length of pull is generally measured from the front trigger. You might need a little more cast-off on your stock.

Here's a short course on stock bending:
Click to expand...
ah, a nice old school gentleman of the UK origin doing no frills stock bending. I enjoyed watching it, thanks :)
This is the way I like doing things too :D
The only thing which I didn't catch was the type of oil which he uses. Which one was that? He told that the boiled linseed oil is not good. Also, I guess the varnish coating can probably degrade in that area, but it is OK.

brybenn said:
I'd let several people try to pattern it. It maybe you or it maybe the gun is not regulated correctly. There's ways to shift point of impact with stock alterations and even shaving the muzzles but I'd definitely test the gun first
Click to expand...
So far I patterned and adjusted at least a half a dozen of shotguns myself using the simplest methods, like shims, spacers, etc. The only thing which I never did was stock bending. But that video gives me a hope )) I feel like I can do it too.
Not sure to try messing with the muzzle though.

Ok, maybe I should try to make a 10mm butt stock spacer first then test shoot and see how much it helps. If not much, then stock bending will be another step.
 
You can accomplish the same thing with just heat, as long as you are careful to not let the stock get too dry, and keep the heat gentle enough to avoid damage to the finish. Winter is a terrible time to attempt it in most of Canada, as most homes have very low humidity, and the stock might have a moisture content as low as 6%, and be a crack waiting to happen.
Muggy summertime conditions, or some artificial reproduction thereof, are perfect for bending wood with direct heat. I have bent recurve tips in stickbows in this manner, and was amazed at how easy it moved.
Gentle heat, firm pressure, and time.
 
A guy called Devonshire gunsmith shows using halogen heat lamps and a jig to bend a stock. He's a bit of a hack sometimes but his bending jig looks good.
 
Thanks for sharing those videos!

I really enjoyed Mr. Rowe recounting the story of the old guy not being able to hit anything with the shotgun & how he fixed it with more cast.

Cheers
Jay
 
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