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I own a few "Guide Guns" in .450 Marlin. I have tried several hammer extensions supposedly made for my rifle. All have worked fine until they loosened up from recoil. I thn get light primer strikes on the first shot, then go off on second. The extension gets loose then presents too musch mass and slop to reliably detonate the primer. Can't have that in the deer woods. I've tried Locktite,Gorilla lue, etc, they all loosen up and cause same problem. any suggestions?
 

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I wont use them on a gun I need to rely on. They add to much weight to a hammer and like your experiencing will cause light primer hits. I cant figure though why being loose would make any differnce at all. Id about bet even if you find a way to keep it tight your eventually going to find that it causes a misfire. I about know that someone is going to jump down my throat and say that theyve been using them for years without trouble. Well your either lucky or dont shoot enough to see it.
 

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Lloyd said:
. I about know that someone is going to jump down my throat and say that theyve been using them for years without trouble. Well your either lucky or dont shoot enough to see it.

Won't be me. They're nothing but trouble. I don't need the slower lock times or any of the headaches that go along with it.
 

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Mine loosens up too but I've never had a mis-fire even when it was loose. Somewhere I saw a post that showed that you can replace the tiny threaded pin with a longer machine screw of the same diameter. This will allow you to tighten down the unit much more firmly.

By the way, some hammer extensions are made of steel while others are made of lighter materials. If the weight is a problem then maybe an aluminum or similar lightweight extension would solve the misfire problem.

My scope is mounted very close to the hammer and an extension is necessary. Marlin should have made a T shaped hammer as an option. Maybe one of the guys here could make something and offer it for sale to the group.

You may also leave a post over at the Marlin Owners bulletin board. Lots of very knowledgeable guys over there.
 

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I have had no issues with the hammer extinction on my 336.
Quote from earlier post.

"I shoot from the right and left side. I replaced the one sided hammer extinction on my 336 with one designed for the Thompson Contender. I had to file it down on the lower side to gain proper clearance. I did this at the time I replaced the 4X Weaver with the 2x7-35MM Burris. I can safely cock the hammer with the two side extension and return it to the half cock position. Burris scope shown."

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I have fired close to two hundred rounds since the installation, the primary ammunition has been full power handloads but I have also fired commercial Remington, Winchester, Federal, and Hornady. I think that is a few more rounds on the high side then most people put through their 336. The only screw I have had to tighten was the front barrel band. Admittedly the recoil from my 30-30 is mild compared to the 45-70.

I cannot recall if I used Loc-Tite but if I did it was the blue.

I just put the rifle away for this year but I will be sure and check the extension the next time the rifle is out.
 
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