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Harter66
10-06-2015, 01:35 PM
I've thrown in on the NOE boolit as both a PB and GC. I know I can patch it up for a x39 I have .
I have this probably special ordered 110 LH that has a stupid long throat and according to my notes a 1-8.5 twist . It likes a .312-314 but is over all .300x308- .
I suspect it was ordered by a moose/bear hunter and fed a diet of 225s throughout the late 60s then just put away until someone got broke or inherited it and found it wouldn't shoot the 90s ammo and hocked it.
I remember checking the twist about 6 ways and about 10x and coming up with 8.25 - just less than 9 so this particular chupacobra does exist.

I have a poorly made but functional 200gr spire point PB mould that just misses my needed ftlb@range mark whether I send it along greased up or neatly swaddled in paper. It simply goes off on its own to points unknown. I suspect that it slumps unevenly as it did it 1st at about 1600 fps with 50/50 WW / 1-20 but went on up to 1800 when it was changed to 75/25 . Oddly enough it will run up to 1700 patched in the 24" x39 sk s in either alloy .

So I have a 300 x 308 30-06' and it has enough twist to shoot the 311-230. Strelok says that this combo only needs about 1800 fps (I'm looking for 1900 as a long margine for error ) to meet the ftlb@range numbers. Strelok says at 1900 fps ,100 yd zero , it has a 10.5 inch hold over at 200 yards and is over the minimum energy limit by 50% . I have sufficient 4350,4831 and W857 to shoot nearly full cases (I don't see full cases happening with any except the 857). The big question is will the boolit profile stand the launch at a WC 75/25 alloy or a 50/50 or even an AC WW ? I know the 1st 2 will ......should expand like some cousins in coats and hunting is the ultimate quest, that would be the make or break .

Harter66
10-07-2015, 02:31 PM
In extreme boredom I fiddled wire the Strelok app some more. I found that I can back this guy down to 1550 fps and keep the 1000 ftlb @100 yd (state law for big game ,no I have no idea how it would be enforced ). I see 1550 as being fairly easy to obtain without boolit failure . It also comes out well down into the 130,000 rpm range . So getting little groups shouldn't be to bad to achieve .
Even under 1600 fps in a 21" bbl should I start with slow magnum powders and push it all the way out or should I try it with the faster powders to "let the bullet settle down" after the peak ? I think I can get 1600 or pretty close with Unique as easily as with W857 or 4350 ......maybe easier .