Yeah, that was probably the difference.
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Ramshot Grand 300 WM = Velocity!
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Was that a compressed load?
If it was it was barely compressed.
Thats before I started going over .002 neck tension and I know I didn't have problems with seating length/consistency
Thats before I started going over .002 neck tension and I know I didn't have problems with seating length/consistency
Critter Picker
Well-Known Member
There was an interesting article in the New Shooting Times on the Garmen Zero.
Not trying to derail but I thought that garmin thing was the greatest thing since the invention of gunpowder?
OP this would make me scratch my head too. This seems like my kinda load development luck haha. I'm interested in your results. As of now I have a 22" 300wm that is doing 50-75fps faster than the your findings but with H1k.
was the brass the same or on a second loading/different loading cycle? All thing being equal/temp/fouling/charge/seating/neck tension, maybe brass is just fire formed to the chamber?
NW Sportsman
Active Member
I use 79.1 grains of Magnum behind a 180 grain Barnes TTSX.
I don't know the muzzle velocity but I get 1/2" groups at 200 yards.
My rifle is a R1 Benelli.
I don't know the muzzle velocity but I get 1/2" groups at 200 yards.
My rifle is a R1 Benelli.
On paper, and published data it looks good. Maybe better for magnum type cartridges that run out of case capacity with h1000 or retumbo like the 6.5 prc? I think I will take the wait and see approach. Of course if it turns out to be a great powder it will probably get hard to find.
Critter Picker
Well-Known Member
The xero is pretty grear,but like the labradar it uses dopplar radar to measure velocity. So when set up ,unless mounted to the object firing the projectile, the projectile is moving away from the xero at an angle. If that angle changes it will affect the reading.
A 25 FPS change is A very small change percentage wise. Less than 1% at the velocity he is shooting. I think thet moving the xero a few inches could cause that change. 1% isn't really that great of an error. It could be eliminated by marking a spot on the bench for the xero and a spot for the bipod/ rest. Still less set up time than a conventional coronagraph.
Critter Picker
Well-Known Member
I'd say that's consistent!
Dangit, I got excited hoping that was your new .308 caliber Carbon Six!
All the same.
I didn't get a picture of the group, it was at 200 yards and about 1.25 inches the first group pictured measured .475 so the group at 200 was slightly larger could have been me. My 60 year old eyes aren't as good as they once was.
