Need help For Tighter Groups

[Philip Taylor]

With a 15-20 mph headwind, I would expect maybe 1/2″ deviation at 50 yards, but maybe more likely 1/16″.

I am searching for my tool right now, so I will figure out if the barrel is properly mounted first. Last night I took my BCG apart and cleaned everything with some quickshot. After that I oiled the critical points with good old Hoppe’s gun oil. I also scrubbed my bore with a stainless steel tornado brush dipped in bench-rest copper solvent. I emptied two 5 round mags with no stove-piping.

Off and on I have been searching for my multi-tool, afterI find it, I will inspect the barrel mount and correct it. As per your suggestions, I will use a blue thread-locker and test again.

I have a basic muzzle break on it, and it is tight, I guess I should lock that on too.

Thanks for the tips.

[SC]

To be clear, I am not saying to use a threadlocker on the barrel nut threads. Use a dab of grease for that.

The issue is if there is a small gap between upper receiver and the barrel extension. This will allow the barrel to move around inside the receiver. Adding a small amount of Loctite 602 or similar, to the outside of the extension, then putting it into the receiver, will act as a bedding compound. When it sets, the Loctite will harden, holding the barrel in place.

Similar to putting two pieces of pvc pipe together. You apply glue to the inside of the coupling and the outside of the pipe, then press them together.

[Philip Taylor]

I found this interesting wind chart:

Wind Drift of All Rifle Cartridges: A handy table

It turns out 350 legend is very sensitive to wind drift. At 300 yards in a 10 MPH wind, the drift is 20.9″, so at 50 yards it could be close to 3.5″. Yesterday the wind was closer to 15 mph or more. The wind was opposing my shots completely which could cause a deflection in any direction, so I am not so sure this was a good test. Wednesday I will do the 5 shot groups again due to wind forecast.

[musketjon]

Try adjusting the seating depth. Try some a little shorter (deeper seated) and some a little longer. The published coals are just a starting point. Your rifle may prefer a shorter or longer coal.

Jon

[Author]

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