SK HIGH VELOCITY MATCH: BARREL LENGTH AND VELOCITY DOWN RANGE

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WHY
I was able to get my hands on the brand new SK High Velocity match ammunition. In all my my years of shooting 22LR high velocity and match was not something you used in the same sentence. Though with SK and the quality of their 22LR lineup I was willing to give it a try. This ammunition was made in Germany and developed for PRS and NRL22 courses of fire.

DATA GATHERING
Not only did I want to see what accuracy I would achieve with this ammunition. I wanted to make sure I had captured sound results, by trying this ammunition in 3 different rifles all with different barrel lengths. Christensen Arms Ranger 22 16in barrel, Lithgow LA101 20in barrel and a CZ455 Trainer with a 24in barrel.

This time I wanted to place the chronograph down range to see if these rounds would make the transition from Supersonic to subsonic before reaching the target. This was an important piece of data for me as this transition can often cause instability in the projectile.

I have also read from many experts that the ideal length for a 22lr barrel is 18inches. After that it is believed that the extra length in barrel starts to slow velocity.

TESTING SPECIFICATIONS
All Groups Shot At 50 Yards
Wind Gust 10-15Mph West South West
63 Degrees
Chronograph placed in front of the target at 50 yards
SK High Velocity Match 1263fps as printed in SK literature

RESULTS
Pictures are worth a thousand words right so video has to be even better

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chrono_graph-rANGER22.jpg

chrono_graph-lithgow.jpg

chrono_graph-Trainer.jpg

By the numbers and the graphs above it would seem this ammunition is continuing to pick up velocity even in the 24in barrel of the CZ455. Though I was shocked that the ammo had made the transonic transition by the time it reached the target at 50 yards. Though could this potentially have been caused by the wind? Interesting sure enough.

ACCURACY
Not sure if I could have expected better on such a windy day, though the SK High Velocity proved to be a bit better than the Federal Gold Medal High Velocity Match I previously tested. Both are in the same price range.

TgtGfx.jpg

Lithgow101 turned in the smallest group of the day at 0.718in
CZ455 Trainer had the second best group at 0.827in
Ranger 22 had the third best group at 0.875in
The Average MOA for all rifles was 1.64MOA



I love Gathering DATA
 
I find the sharing of your knowledge and expertise invaluable. And the way in which you freely share you knowledge as exemplary for humans in the shooting sports.
Well done, sir!:thumbup:

I am consistently impressed by the Lithgow. Those Aussies know their rimfires!
 
Jim I really do not appreciate your question with your attempt to push me further down this rabbit hole. Jim I am only kidding sir with box velocity at 1263 I thought for sure it would be above supersonic at 50 as at my elevation level that is about 1100fps. After seeing these results you know I am going back to now get muzzle velocity LOL. This just threw me for a loop and did not have time to get muzzle velocity on this day.
 
I have not seriously shot .22 farther than 50 yards, but some BPCR .22 shooters use HV and put up with the transition to get to 200 yards.
I do shoot BPCR and just let it drop. There was some work done with .45-70 Subsonic a few years ago, but it was no advantage.
 
I find the sharing of your knowledge and expertise invaluable. And the way in which you freely share you knowledge as exemplary for humans in the shooting sports.
Well done, sir!:thumbup:

I am consistently impressed by the Lithgow. Those Aussies know their rimfires!
What he said!

I used to strap my magneto speed to my barrel and then set up my eyeball chrono down range when testing my final loads on my centerfires, but i havent done any real load work in a year or so.
Ive also never tried that with a .22. but that would be really interesting thing to try with .22s, and a good way to get back in the groove of not preforating my chrono at 100yds
I may have to give it a shot next time im out.
 
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