Thanks. I was really bleary-eyed after carefully firing all those shots.Those are some amazing 50 yard groups for a semi-auto.
Do changes in humidity/season affect the POI with your bedding method? Just curious about the wood stock and pressure.Wally: Very good groups, considering the ammo!
Some of the things that improved accuracy for my 10-22 include, headspace reduction, firing pin tuning, relief of operating handle (eliminates first-shot flyers), and considerable upward forend pressure pad that forces the rear of "single screw" action down into the bedding.
Haven't noticed any shift in POI. The stock is well-sealed inside and has pretty uniform grain. Besides the forend pad, the barrel is bedded for a couple of inches from the receiver. The stiffness of the bull-barrel helps consistency.Do changes in humidity/season affect the POI with your bedding method? Just curious about the wood stock and pressure.
I've heard of/understand the rest but I can't say I'm familiar with one,,, Can you help me to better understand the general gist of this one?relief of operating handle (eliminates first-shot flyers),.
The operating handle normally fit tightly in the bolt slot. I theorized that the first shot was made after racking the bolt by hand and that the slot in the operating handle where the firing pin runs could be binding the firing pin on the first shot, but at that shot and bolt movement, was freed-up by the bolt movement.I've heard of/understand the rest but I can't say I'm familiar with one,,, Can you help me to better understand the general gist of this one?
Thanks!!!
I haven't shot groups with my 10-22 for a long time, so don't know whether accuracy has deteriorated or not. I deliberately didn't shoot it in the Plinker class in the rimfire benchrest matches I ran because we were trying to encourage people to come. However, a couple of guys who used my accurizing tips did very well!Good shooting (and a nice shootin' iron). Perhaps we should start a rimfire "Prove It" thread? I haven't shot the 10/22 in a while, and now you have me interested ...
The operating handle normally fit tightly in the bolt slot. I theorized that the first shot was made after racking the bolt by hand and that the slot in the operating handle where the firing pin runs could be binding the firing pin on the first shot, but at that shot and bolt movement, was freed-up by the bolt movement.
The cure was to file the operating handle, so it fit loosely in the bolt slot and not bind the firing pin when manually cycling the bolt. It proved successful! This was written up on Rimfire Central and others found that it worked for their rifles as well.
I did a bunch of mods to the bolt, including deepening the stake marks in the top, to make firing pin strikes more uniform, grinding the bolt face to reduce headspace to rim thickness. Also, reshaped the firing pin nose to increase strike depth and keep the top of the pin from striking too high on shell rims. The result was very uniform ignition.
Just go to Rimfire Central and seek the Tips and Tricks section...I think that's what it's still called. Look for my name and click on it. I'll also try to find my copy.Very interesting... was burnishing / polishing enough ? or ... do you have a link to the Rimfire Central thread ?