If you want to set fire to the coyote population. Build you one of my toys. A 30/378 Wearherby with a 5R 1-13" twist 31" Bartlein pushing a 125 grain Hornady SST at 4,130. And you are correct. I really don't give a shit how long the barrel survives. When you see stuff just disappear in front of your eyes, then, you know your blowing stuff up. Have fun and enjoy it!! There are Plenty barrel makers that will be glad to take your order.
6mm mach 4 load data
- Thread starter matthias
- Start date
My buddy runs a (Jarrett) .243 Catbird, 1:14 twist Hart. Pretty much, its a 6-06 Imp 35°
He can spool a 70Btip 4050 from a 26" barrel, via a goodly amount of RL-22. So, your expectations are quite realistic!
He's tried up to 85gr Sierras successfully in that slow twist, shows how uber-velocity can help stabilize a bullet that wouldn't at more 'conventional' speeds. That's what you're shooting for, if you want your bullets to make it to target in one piece...
I talked him into a building .22-243AI for coyote hunting a couple years back. Now he only shoots the Catbird at the range, the .22-243AI is just so much more pleasant to shoot on stand. Matter of fact, the Catbird barrel is toast from range shooting, LOL. He's going with a 1:12 this time around, wanting to spin up to 88gr Bergers. Bet a 95VLD would spin at that speed, too. Again, the slow twist will keep RPM in check and help prevent jacket failure...
Anyhoo, good luck, the 6MachIV sounds like a smoker! Have fun & let us know how it shakes out...
He can spool a 70Btip 4050 from a 26" barrel, via a goodly amount of RL-22. So, your expectations are quite realistic!
He's tried up to 85gr Sierras successfully in that slow twist, shows how uber-velocity can help stabilize a bullet that wouldn't at more 'conventional' speeds. That's what you're shooting for, if you want your bullets to make it to target in one piece...
I talked him into a building .22-243AI for coyote hunting a couple years back. Now he only shoots the Catbird at the range, the .22-243AI is just so much more pleasant to shoot on stand. Matter of fact, the Catbird barrel is toast from range shooting, LOL. He's going with a 1:12 this time around, wanting to spin up to 88gr Bergers. Bet a 95VLD would spin at that speed, too. Again, the slow twist will keep RPM in check and help prevent jacket failure...
Anyhoo, good luck, the 6MachIV sounds like a smoker! Have fun & let us know how it shakes out...
matthias
Gold $$ Contributor
Well update time.
Lesson learned read the ******************* print before you buy a reamer. Stupidly I bought a reamer called 6mm mach 4 when in fact it looks to be a 6-284 .
Silly me I thought buying dies would be the hard part but rcbs was all set and ptg has some guys personal reamer design listed as 6mm mach 4 .
So now I am back on the hunt for a reamer that is a 7mm rem mag with a 40* shoulder necked down to 6mm .
Getting real tired , may look at options
Lesson learned read the ******************* print before you buy a reamer. Stupidly I bought a reamer called 6mm mach 4 when in fact it looks to be a 6-284 .
Silly me I thought buying dies would be the hard part but rcbs was all set and ptg has some guys personal reamer design listed as 6mm mach 4 .
So now I am back on the hunt for a reamer that is a 7mm rem mag with a 40* shoulder necked down to 6mm .
Getting real tired , may look at options
Phil
Gold $$ Contributor
LOL......muleystalker
Silver $$ Contributor
That 6x284 wouldn't be a bad choice, It ought to be some pretty impressive results, especially the lighter bullets you are looking at. You ought to run some calc's with those bullets, I think you'll be surprised . Its a real efficient case, I bet its not that much behind the 6mach IV
Well.... what happened ....?
matthias
Gold $$ Contributor
Pacific tool and gauge lost my business by never responding to my email or phonecalls looking for the correct reamer. I wanted to buy one with the correct dimensions. Never asked for a refund or exchange. Just wanted to buy another .
So I called jgs and the reamer should be here some time in January. Then a matter of days and it will be shot. The brass is prepared, bullets are chosen , barrel is ready , stock is ready, scope and rings are ready . I am ready .
So I called jgs and the reamer should be here some time in January. Then a matter of days and it will be shot. The brass is prepared, bullets are chosen , barrel is ready , stock is ready, scope and rings are ready . I am ready .
Take a picture of the loads from the article and upload it on this thread.
I'm sure more than just Matthias will find it useful.
Someone down the road will be looking and will come across this thread.
rickiesrevenge
Silver $$ Contributor
I'm interested to see how this turns out. I've thought about building one in this class too.
Aaron
Aaron
I am not sure how to up load so I will type it in .
70 grain nosler imr 7828 74.0 grains v 4205 fps
75 grain barnes x imr 7828 73.0 grains v 3995 fps
75 grains barnes ww 860 87.0 grains v 4150 fps
90 grain barnes ww860 81.0 3850 fps
90 grain barnes ww872 86 grains 3759 fps
90 grain barnes aa8700 78 grains 3546 fps
95 nosler ww872 86 3643 fps
95 nosler ww872 86 3817 fps
95 nosler ww860 82 3680 fps
95 nosler aa8700 81 3640 fps
100 nosler ww 872 85 3780 fps
100 barnes ww860 82 3634 fps
105 berger ww872 85 3572 fps
I hope this is usefull o every one.barrel length is 25 to28 in length.he used a 700 reminton action
these loads are said to be reference only.consuilt your rifle builder for specific loadfing data.reduce all loads by 5%.
gary b
70 grain nosler imr 7828 74.0 grains v 4205 fps
75 grain barnes x imr 7828 73.0 grains v 3995 fps
75 grains barnes ww 860 87.0 grains v 4150 fps
90 grain barnes ww860 81.0 3850 fps
90 grain barnes ww872 86 grains 3759 fps
90 grain barnes aa8700 78 grains 3546 fps
95 nosler ww872 86 3643 fps
95 nosler ww872 86 3817 fps
95 nosler ww860 82 3680 fps
95 nosler aa8700 81 3640 fps
100 nosler ww 872 85 3780 fps
100 barnes ww860 82 3634 fps
105 berger ww872 85 3572 fps
I hope this is usefull o every one.barrel length is 25 to28 in length.he used a 700 reminton action
these loads are said to be reference only.consuilt your rifle builder for specific loadfing data.reduce all loads by 5%.
gary b
I've seen 107s run to 3575 and they held together. You might want even slower than H1000. Good luck
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