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Gunsmithing AR-15 Barrel Extension Clearance
I have a Rock River Arms NM A4 20 Inch CMP Rifle (2016) LAR-15, which is used in NRA High Power and CMP shooting. The current original barrel is showing some throat erosion. I purchased a 20” HBAR replacement barrel from Krieger that will be installed down the road. Did some research and...- jim10801
- Thread
- Replies: 10
- Forum: The Armory
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Unburned IMR 4451 in barrel throat
In my AI AT with a 6.5 Creedmoor barrel, 42.3 grains 4451 under Berger 140 VLD Match, once in a while after firing a round, will work the action to reload a round from the magazine and the round will almost, but not quite chamber. It appears to be from an unburned kernel of powder getting wedged...- jim10801
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- Replies: 5
- Forum: Reloading Depot
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Gunsmithing Mitutoyo Digital Solar Powered Caliper
For years I have been using what I consider one of the finest calipers around, a Starrett 123-6 Master Vernier Caliper. Been thinking about getting a Mitutoyo Digital, Solar Powered Caliper. I don't believe that they would be any more accurate, but easier to use with the different comparators...- jim10801
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- Replies: 3
- Forum: The Armory
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AI AT Barrel & Bolt Position
The AI AT manual does not say one way or the other but a conversation came about recently about the bolt position when changing a barrel. I have always had the bolt pulled back (or removed) when changing out/replacing a barrel and then setting the torque on the barrel clamp screw. Does it matter?- jim10801
- Thread
- Replies: 12
- Forum: Bolt Action Rifles
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AI Adjustable Butt Plate
Anyone have any experience/knowledge with this? A review I saw says it only goes "up" about a 1/2 inch. I'm more interested in how far down it travels in order to raise the stock in relation to your shoulder and thereby straightening you neck some. This is in addition to the angular...- jim10801
- Thread
- Replies: 1
- Forum: Bolt Action Rifles
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SOLD - For Sale: Forster .308 Bench Rest Full Length Sizer Die - SOLD
For Sale: Forster .308 Bench Rest Full Length Sizer Die - $28 Shipped Never Used. Shipped Priority Mail. USA Only. PayPal Only PM or email me for details.- jim10801
- Thread
- Replies: 1
- Forum: Buy - Sell - Trade Archive
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The 1,000 Yard Rifle
I purchased a Accuracy International AT308 and have several additional barrels for it. The gun range where I have been a member for the last 30 years has a 100/200/300 yard (member only) range. It is only recently that I have traveled to a different gun club where they have a 600 yard range and...- jim10801
- Thread
- Replies: 27
- Forum: Bolt Action Rifles
