22X47 Lapua

[alf]

Seems to be a little interest in this round, so I thought I'd share my latest project.

Made up a dummy with an 80 grain Berger VLD seated to where I wanted it, and sent it to JGS:

JGS reamer, .257 neck, 1.870" case length, .075" freebore:

 

[alf]

Triplets....same mommy....different daddy.....



22x47 Lapua - 6x47 Lapua - 6.5x47 Lapua

 

[alf]

Another comparison.

All 3 loaded with Berger 80gr VLD's..... 22-204 - 22x47 Lapua - 22-250

 

[alf]

Since this is for a dedicated coyote hunting, carrying, calling, killin' gun, it's built sporter style:

Barrel is an eight twist Bartein 2b contour, cut & crowned at 23"

Stock is a McM Edge Classic, sans paint, with 2 flush cups & 2 S/S sling studs.

Seekins 20 MOA Picatinny rail and lapped 30mm medium rings on top.

Scope is a Nightforce Compact NXS 2.5-10x32 HS ZS with the illuminated IHR reticle.

 

[alf]

Low tech farting around comparing capacities, using AA-2230 to the bottom of the necks (cause it flows like water), the 22x47 has a grain and a half advantage over a 22-250 in fired brass. Likely more if I'd only gone to the shoulder.

The 22-250 has around .050" total case taper with a 28* shoulder, the 47 has .013 taper and a 30* shoulder angle. Damn close to a factory "Improved" case.

 

[alf]

So load work began, with the Berger 80 VLD's in the lands, and three powders that I had on the shelf, Varget, H-4350, and H4831-SC. Based on research, and past experience with a 22-250 AI, I figured the H-4350 was the place to be, but I wanted to explore both sides of it, speed wise. Primers were Remington 7 1/2's. An extra 6.5-20x50 LRT Leupold was mounted up, and testing commenced.

As figured, 4831 was a touch too slow, and crunching powder before reaching top velocity. I found a good load with the other pair, so I had a shoot off between them, while testing bullet seating at the same time. I found pretty good accuracy at .060" off, but it still didn't match in the lands accuracy. When the smoke cleared, H-4350, with the Bergers in the lands, won out.

 

[Eric Leonard]

what speeds did the 4350 and varget loads turn out,,

 

[STS]

I have one myself and like it. I fell prey to the suppressor bug and chambered up an old Hart barrel for the can and doubt I'll remount the .22x47 barrel. Superbly accurate.

 

[alf]

When the smoke cleared, H-4350, with the Bergers in the lands, won out.

Velocity with this winning load is 3370.......

 

[Clancy]

I'm chopping mine at 22" for handiness. I'll be tickled with 3300 or better from the 80.5.

It should reach about the same, 3370, lose a few fps from the inch of barrel, gain it back with a shorter bearing surface.

 

[alf]

I'm chopping mine at 22" for handiness. I'll be tickled with 3300 or better from the 80.5.
It should reach about the same, 3370, lose a few fps from the inch of barrel, gain it back with a shorter bearing surface.

FYI, I lost 30 fps seated off the lands.

 

[Hal]

Looks like a great state of the art coyote rifle.
How does it shoot and what does it weight ?

Hal

 

[alf]

Since I load for both the 6 and 6.5x47 cases, I didn't have to buy anything new to load the 22. I even had a .252" and .250" bushings left over from past toys.

I have a 6.5x47 full length bushing die and a 6 x47 bushing neck die to handle case forming and sizing chores, and use a Wilson 6x47 inline bullet seater for stuffin' bullets.

 

[Clancy]

Alf I don't see a donut from using the bushing die, how are you avoiding that?

 

[RGRobinett]

Al, is the presumption that .257" NK diameter equates to, "no-turn", correct? RG

 

[nakneker]

Thanks for the thread. I have the bug and you have built what I've been wanting to build. I have a 6.5,25 & 6 x47, so it will be easy to load for a 22x47.

 

[alf]

Looks like a great state of the art coyote rifle.

Thanks Hal....I agree......

How does it shoot?

Damn good........

What does it weight ?

Weighs in at 8-10. A little more than what I prefer, but I substituted a little extra weight for the absolute reliability of the Nightforce scope (19 ozs) and Seekings rings & bases (7 ozs).

The Bartlein 2b is a little porky at a half ounce over three pounds as well. It replaced a 2 lb 8 oz #3 Brux 22" 6x47 barrel.

 

[alf]

Alf I don't see a donut from using the bushing die, how are you avoiding that?

I set the die up as per usual, with a little wiggle on the bushing, and sized away.

Zero donut issue.

 

[alf]

Al, is the presumption that .257" NK diameter equates to, "no-turn", correct? RG

Hey Randy.....

Yes, no turn. JGS had a .256" on the shelf (with a short freebore) that they considered no turn, but my dummy was .2545" on the fat side. I felt .257" was a better option.

My dummy round was made on one case that had been shot 12 times as a pressure test in a 6.5x47 barrel. I trimmed it to 1.850", and once down to 22 caliber, it had grown to 1.860", so that's why I specified a 1.870" case length. My 100 pieces have been shot a couple times now, and barely make 1.850"......go figure.

 

[fredo]

Velocity with this winning load is 3370.......

Oh, you'll be real happy with that on coyotes!
My .22-243AI fireforming loads run in that range with an 80, but that's courtesy of 4" more barrel. Needless to say, that'll be a coyote thumpin' SOB! Impressive speed from only 22" of tube, you've got a winner there...

Very nicely appointed rifle, best of luck & have fun!!!