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Another Custom XP-100
After trying my hand at a local PRS match back last spring...See old thread: https://forums.gunsandammo.com/discussion/42352/the-surprising-20-caliber-cartridges
I wanted to be a little more competitive with the rifle guys, especially in the wind drift area, but I wanted to do it with a specialty pistol.
The challenging part of PRS or NRL matches is you do not have a spotter.
You have to spot your own shots, which is difficult with a center-grip XP, and it is much easier with a rear-grip specialty pistol.
What is a guy to do?
Build both in the same chamber.
I had already shot a 22 Creedmoor (Curmudgeon for some here) in a center-grip XP during a PRS match and it didn't work well. It was too much.
A cartridge that came out fairly recently was the 6 GT, which is also called the 6mm Gay Tiger-No joke.
It works in standard SA magazines well with requiring modifications, and it in in the powder range for a long throat life, and very little recoil when shooting from odd positions quickly at distance.
No matter how good your muzzle brake is, it does not start working until after the base of the bullet has cleared the muzzle, so bullet weight does have a bearing on initial recoil impulse.
I wanted to lower my bullet weight, so I decided to go with the 22GT.
85.5 Berger, 88 ELD-M (G1.545 and G7 .274), and 90 grain A-Tips.
7T Hart Heavy barrel, that is just under 16", and a Holland Radial Baffle brake.
Load development is not done, and I don't have any MV's yet.
The rear grip has a Kauger Arms action with a rear grip chassis, and because of it's weight and because it is a rear-grip, I will be able to see my impacts.
My guesstimate with the rear-grip that has a 18" barrel should give me around 2900 fps 85.5 Berger (G7 BC of .268), and with a 100 yard zero, should be around 8.25 MOA at 500 yards with a wind drift for a 10 MPH FV wind is 2.5 MOA or 13 inches.
750 yards: 16 MOA with a 4 MOA wind or 31.5 inches correction.
If you put the 90 grain A-Tip in the MIX the number get kind of awesome, since the BC is really good!
.295 G7 or 585 G1 at mach 2.25 or velocities above 2,500 fps.
these number have been proven multiple times by actual shooting.
To compare the 108 grain ELD-M 6mm bullet also at mach 2.25 has BC's .536 G1 and .270 G7
Now, I have not done load development on the center-grip yet, and I have even shot the rear grip, but here is a picture and video of the center-grip.
A local gunsmith who shoots PRS, and already had the 22GT reamer built both of these for me.
I am using Alpha brass.
I also have some Hornady 6GT brass as well that I can neck down.
I wonder how good the 88 grain ELD-M would work on deer???