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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Thoughts for pre-64 Model 70 upgrades
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<blockquote data-quote="Sage70" data-source="post: 2338668" data-attributes="member: 119027"><p>I have several pre 64 Model 70 Winchesters and I really enjoy tweaking them to improve performance. Here is a list of things that I personally do and it is in the order that I would go and you will see performance improve with each step.</p><p>1. Install a Timney #401 trigger and lower the trigger pull. The trigger installs easily. Just be slow when moving the rear trigger pin to the side so the bolt stop stays in place. If you completely remove the pin the bolt stop spring and pin will fly to the far ends of the world.</p><p>2. Glass bed the recoil lug with Brownell's AccuGlass. This will really keep the action from moving if there is some slack around the recoil lug.</p><p>3. Try a handload with the 150 grain Sierra GameKing with 57 grains of Reloader 17. Second choice would be the 150 Grain Sierra GameKing with 51 grains of IMR 4064. On both loads set the base of the bullet flush with the back of the case neck.</p><p>4. If the rifle is a standard grade and it's still not grouping well the best option is to change the stock. I wouldn't recommend changing the barrel channel on a standard grade. If the rifle is a featherweight you can freefloat the barrel just by removing wood the thickness of a sheet of sandpaper. Cut the sandpaper in strips about an inch wide and hold the paper together above the stock so it doesn't bell shape he channel at the top.</p><p>5. Install a Pachmayr one inch thick Decelerator Pad. I like the ones with the basketweave pattern on the back. Make sure the length of pull in not too long. If the stock drags on your clothing when you shoulder the rifle the pull is too long. This is the most expensive step and it will cost about $125 for a gunsmith to shorten the stock and install the pad.</p></blockquote><p></p>
[QUOTE="Sage70, post: 2338668, member: 119027"] I have several pre 64 Model 70 Winchesters and I really enjoy tweaking them to improve performance. Here is a list of things that I personally do and it is in the order that I would go and you will see performance improve with each step. 1. Install a Timney #401 trigger and lower the trigger pull. The trigger installs easily. Just be slow when moving the rear trigger pin to the side so the bolt stop stays in place. If you completely remove the pin the bolt stop spring and pin will fly to the far ends of the world. 2. Glass bed the recoil lug with Brownell's AccuGlass. This will really keep the action from moving if there is some slack around the recoil lug. 3. Try a handload with the 150 grain Sierra GameKing with 57 grains of Reloader 17. Second choice would be the 150 Grain Sierra GameKing with 51 grains of IMR 4064. On both loads set the base of the bullet flush with the back of the case neck. 4. If the rifle is a standard grade and it's still not grouping well the best option is to change the stock. I wouldn't recommend changing the barrel channel on a standard grade. If the rifle is a featherweight you can freefloat the barrel just by removing wood the thickness of a sheet of sandpaper. Cut the sandpaper in strips about an inch wide and hold the paper together above the stock so it doesn't bell shape he channel at the top. 5. Install a Pachmayr one inch thick Decelerator Pad. I like the ones with the basketweave pattern on the back. Make sure the length of pull in not too long. If the stock drags on your clothing when you shoulder the rifle the pull is too long. This is the most expensive step and it will cost about $125 for a gunsmith to shorten the stock and install the pad. [/QUOTE]
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Thoughts for pre-64 Model 70 upgrades
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