H4350 will be my starting point
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Going Back To Where I Started........... Kinda
- Thread starter ButterBean
- Start date
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comfisherman
Well-Known Member
Saw the 22-284 referenced earlier. Back in the college days the local gun show was a good one. Several old codgers who must have hit up every estate sale in the west and a collection of dies that stacked 10 high and 2 deep covered several tables. At any rate we found a set of 22-284 dies and upon inspection the die case had a solid pilot reamer in it. Back in pre obummer days there was always another old coot selling 5 gallon pails of takeoff and goof up barrel blanks for essentially little more than scrap prices. We found a 1.5 inch straight bull chromolly 26 inch tube that turned out to be near a 13 twist.
It was promptly screwed to a Steven's 200 that I already had and we headspaced it with a shoulder cause it's od was larger than a savage nut. The smith was a 19 year old freshman in engineering who had almost 0 machine time but plenty of confidence. It was paired with my dremel Smith enthusiasm and was fortunately not that dangerous.(barrel was so heavy we bedded the lug, front action screw and barrel in solid plastic epoxy in a plastic takeoff stock someone gave us.)
At the time the only solids we had were I think 45 grain barnes xlc bullets, the funny Teflon coated blue things. We flung 40 ballistic tips, more than a few flavors of 55s the Barnes and exploded a fair bit of soft jacket 75s.
At the time the prevailing idea was a 12 twist would be slightly faster with light bullets than a 7 or 8 twist all things being equal. I've no idea if that is actually so.
We never found a ceiling on velocity. We were poor college kids and our chronograph topped out at 4400 fps, which we definitely hit with the Barnes.
Accuracy wasn't super great, but that could of been lots of reasons. I don't think the reamer was all that great, it certainly introduced us to the concept of bit chatter... I remember the barrel was a bit out of center as the running joke was it was a 20moa canted barrel...
Years later I hit the mid 4000s with 40 grain b tips and a 223 wssm. I'd like to do a 220 redline barrel for my 300 wsm action, but I'd probably settle on a 9 twist and 75s. 223-3006 probably similar to the redline in capacity. I'd think under 70 grains I'd be like an empty diesel with low gears.... just spinning out a bit.
Redline gets 75s in excess of 3900, does the math Trump a 51 hammer at 5k?
It was promptly screwed to a Steven's 200 that I already had and we headspaced it with a shoulder cause it's od was larger than a savage nut. The smith was a 19 year old freshman in engineering who had almost 0 machine time but plenty of confidence. It was paired with my dremel Smith enthusiasm and was fortunately not that dangerous.(barrel was so heavy we bedded the lug, front action screw and barrel in solid plastic epoxy in a plastic takeoff stock someone gave us.)
At the time the only solids we had were I think 45 grain barnes xlc bullets, the funny Teflon coated blue things. We flung 40 ballistic tips, more than a few flavors of 55s the Barnes and exploded a fair bit of soft jacket 75s.
At the time the prevailing idea was a 12 twist would be slightly faster with light bullets than a 7 or 8 twist all things being equal. I've no idea if that is actually so.
We never found a ceiling on velocity. We were poor college kids and our chronograph topped out at 4400 fps, which we definitely hit with the Barnes.
Accuracy wasn't super great, but that could of been lots of reasons. I don't think the reamer was all that great, it certainly introduced us to the concept of bit chatter... I remember the barrel was a bit out of center as the running joke was it was a 20moa canted barrel...
Years later I hit the mid 4000s with 40 grain b tips and a 223 wssm. I'd like to do a 220 redline barrel for my 300 wsm action, but I'd probably settle on a 9 twist and 75s. 223-3006 probably similar to the redline in capacity. I'd think under 70 grains I'd be like an empty diesel with low gears.... just spinning out a bit.
Redline gets 75s in excess of 3900, does the math Trump a 51 hammer at 5k?
sierracharlie338
Well-Known Member
Just catching up on this thread Bean. Can't wait to see what you come up with as Im a fan of your previous work!!
@ButterBean : Keep Ramshot Hunter in back pocket. Getting exceptional velocity increase over std powders. Nice ball powder that gives great fill densities with Hammers. Just a thought.
isaaccarlson
Well-Known Member
A 7 twist at 5k is doing 514000 rpm. That's 841,000 g's of rotation for a .224" bullet. Even copper would come apart at those rpm. Rotational g's help a bullet expand/explode when it hits the target.
A 12 twist would be about the limit, I think. I'm curious to see what happens.
A 12 twist would be about the limit, I think. I'm curious to see what happens.
RockyMtnMT
Official LRH Sponsor
Can't wait! Saw your order come through today. Bullets are headed your way. I'll also mention that Bean paid full price without a vet discount. Just sayin....
RockyMtnMT
Official LRH Sponsor
I know there is a twist limit somewhere. We haven't seen it yet. If he can spin one apart then we will see it for the first time. Looking forward to this one.
waspocrew
Well-Known Member
That was my first thought as well - wicked RPMs. Definitely interested in the results!
Just so happens I have some in stock
I'm trying to kill the pill but my moneys on the bullet
HARPERC
Well-Known Member
My guess is powder will be more limiting than bullet.
Either way my money is @ButterBean making his goal.
I just hope he gets meat in front of it.
I'm too lazy to go back and do the math on all the combo's of twist and velocity that have been tried, but one thing I can say we have tried to destroy them. Not yet, so for now like Buzz Lightyear says, its to infinity and beyond.
Either way my money is @ButterBean making his goal.
I just hope he gets meat in front of it.
I'm too lazy to go back and do the math on all the combo's of twist and velocity that have been tried, but one thing I can say we have tried to destroy them. Not yet, so for now like Buzz Lightyear says, its to infinity and beyond.
I've been running some hammers at 440k rpm's in a worn barrel and have yet to have issues. Although 514K is getting up there.
Il be looking forward to BB's results.
Naaaah.....this time you didn't sound like a Butt ( at least...not a total butt....Good mornin' Brother Bean!)
I love you too Skippy
