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ENCORE PROHUNTER
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ENCORE PROHUNTER
2x oversize hinge pin 2xhp Encore Prohunter Endeavor
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2x oversize hinge pin 2xhp Encore Prohunter Endeavor
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2x Oversized Hinge pin For Thompson Center Encore Prohunter or Endeavor
Part Number:
769
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Description
If your barrel drops open easily and has any side to side movement when opened, that "play" at the hinge does not go away when the barrel is closed, and it permits the barrel to move in an inconsistent manner while the bullet is traveling through it. To reach a barrels accuracy potential, this play at the hinge area must be removed. Stop wasting ammo trying to get your barrel to shoot, just oversize the hinge pin.
The hinge pin holes in Encore barrels and frames vary much more than the holes in Contenders, so much so that in some instances the hinge pin must be at least .003" larger than "stock" in order to get the same degree of precision fit common to the Bellm Oversize Contender Hinge Pins. Stainless steel frames are prone to accept the 2x pin, a result of galling and/or lack of lubrication.
Reaming for these 2x pins is sometimes necessary. At .438" +/-.0001" they fit most all factory and custom barrel hinge pin holes but it is not uncommon to not fit the lug of the barrel. Testing the fit of the 1x pin then the 2x pin in each hole gives an indication as to whether the next larger pin is needed to get the optimum fit desired, that of a bank vault door opening and closing. I know, you never had the privilege, but you get the idea. It does not shake and rattle all over the place.
Use the 2x pin as a gauge pin. Simply lubricate the hinge pin, frame and barrel hole with a common cutting/tapping or heavy viscosity oil. Center the hinge pin on a given hole checking for axial play and resistance. If it is not tight enough, consider it as a gauging tool to determine if a larger pin is called for. When installing the oversized hinge pin, always install the stock hinge pin first, then tap out of the way with the oversized pin. Always remember the lube.
Taking accurate measurements of pins and holes is common among machinists, but not in the realm most folks are familiar with. Thus, the best solution I have found to bridge this technology gap is to simply use a process of elimination by going from one size pin to the next. Anyone can tell if a pin is loose or tight, right? The Encore hinge pin system is a well proven system. "Trial and error" is working very well, and groups are tightening. That is what counts.
So, start with the 1x pin then the 2x unless you have a means of accurately measuring your hinge pin holes in your barrels and frames. By the way, calipers are not accurate enough to give more than a rough idea. Trying a pin is still the best method available to most shooters.
Add a 2x pin to your cart and get started toward better shooting Encore barrels.
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