20 with a tuner

[ab_bentley]

Got into the shop last night with a few minutes of free time, I had a Harrells brake tuner combo for another project and decided to try it on my 20 Practical. I installed it and got to test it today. This was an identical loading at the max charge with bullet into the lands. The groups on the right side were 3 numbers apart with the smallest group 4 numbers apart, I believe .2" advancement from 0. It seems to work rather well, maybe I'm using it all wrong, but if it's printing groups like that....

 

[7stubby]

That dog should hunt.......

 

[Ledd Slinger]

Definitely made a bit of difference. Maybe shoot a couple more groups with the brake adjusted at .2" from zero (4 numbers) to confirm the improvement in accuracy. Thanks for the review. I've always kinda wondered about a tuner''s effectiveness.

 

[ab_bentley]

O = oscillating
H = horizontal
V = vertical

As you can see the harmonic nodes that present themselves through the tuners range. When i would get to a vertical pattern i figured that a node was coming within a few numbers. Just like with reloading for accuracy, I looked for the node in between the vertical and horizontal nodes, where the oscillating pattern can be found. If I saw vertical and then horizontal patterns with no oscillating pattern, I knew I'd gone too far or need to continue further. Now again were talking 40gr Vmax bullets so accuracy has to be taken with a grain of salt and bullets aren't BR specific. Again I'm still figuring this tuner out, but it looks pretty straight forward.

 

[ab_bentley]

A picture of the beast.