Post by mapper on Dec 13, 2023 22:07:55 GMT -5
Non cryo barrel (Wilson arms)
Click image for larger version.
Cryo barrel (rock river)
Click image for larger
Both 5 shot groups
Cryo barrel has a lot higher round count..
Non cryo rd count is 15
Same barrel blank, contour and twist, same ammo in both, same day, same chamber cut, 223 wylde, 20" bull..
Non cryo was fluted.
Mainly moving scopes about and function test of non cryo. I'm satisfied. It's Indian error, not arrow
I'll move the group when I get it at zero distance i want, close enough for now.
77 gr smk over varget, lc cases, cci 450 primers, loaded to mag length.
Load was worked up for the cryo barrel previously..it's not really opened up much
Click image for larger version.
Just cheap handloads
Cryo barrel unknown round count but I've put 1k through it.
Rock river varmint vs clone of one.
A comment I recieved on this was
I have a RRA Cryo 20 inch and the matching rifle AR and it's accuracy with Federal 69g BTHP Match turned heads. I was chasing the perfect zero (which is a greased pig with most semi-autos) and all three of the instructors hovered around and each shot it. It was printing 1/2 MOA with almost no noted zero shift from cold bore to end of string over all four days of shooting. Ultimately they told me to quick screwing around with it.
I think the consensus was the cyro was responsible for keeping the whip consistent from cold to hot.
Click image for larger version.
Cryo barrel (rock river)
Click image for larger
Both 5 shot groups
Cryo barrel has a lot higher round count..
Non cryo rd count is 15
Same barrel blank, contour and twist, same ammo in both, same day, same chamber cut, 223 wylde, 20" bull..
Non cryo was fluted.
Mainly moving scopes about and function test of non cryo. I'm satisfied. It's Indian error, not arrow
I'll move the group when I get it at zero distance i want, close enough for now.
77 gr smk over varget, lc cases, cci 450 primers, loaded to mag length.
Load was worked up for the cryo barrel previously..it's not really opened up much
Click image for larger version.
Just cheap handloads
Cryo barrel unknown round count but I've put 1k through it.
Rock river varmint vs clone of one.
A comment I recieved on this was
I have a RRA Cryo 20 inch and the matching rifle AR and it's accuracy with Federal 69g BTHP Match turned heads. I was chasing the perfect zero (which is a greased pig with most semi-autos) and all three of the instructors hovered around and each shot it. It was printing 1/2 MOA with almost no noted zero shift from cold bore to end of string over all four days of shooting. Ultimately they told me to quick screwing around with it.
I think the consensus was the cyro was responsible for keeping the whip consistent from cold to hot.
Attachments:
