Fredo, always enjoy the write ups! Makes my front Ignition 22-284 look boring...
Gentlemen, I present... the ".220 REDLINE"
- Thread starter fredo
- Start date
6MMsteve
Gold $$ Contributor
man you had a groundhog day...
Fredo -
Howdy !
I am wondering........ w/ the vel you're gonna put on your .243" cal bullets; do you think that you might benefit from use of a heat-resistant tip... such as is featured on a ( example ) Hornady 6mm 90gr ELD-X ?
More specifically.... do you think an ( example ) Hornady 87 "V"-Max or an ( example ) Sierra 90 Tipped-
Gameking will hold up just fine, or..... might the ELD-X high- temp resistant tip be of some use ?
IF ( due to high tip heating ) you start to encounter bullet tip ablation to any significant degree; the bullet's BC will be negatively effected.
Hmmm......
With regards,
357Mag
Mornin’ all, 357...
Haven’t thought too much on ‘melting’ tips being an issue. Will say this, the .240 will be twisted to maximize ~90gr pills, and I have plenty of aforementioned ELD-X to try. Along with various flavor of 80, 87, & 95grainers. That’s the ‘wheelhouse’ the .240Redline is being built around...
FYI, feel free to ‘comment’ where the vids are posted. Dave shares lotsa ‘no nonsense’ wildcat knowledge. I find myself going back to re-read articles, often...
Take care!
Haven’t thought too much on ‘melting’ tips being an issue. Will say this, the .240 will be twisted to maximize ~90gr pills, and I have plenty of aforementioned ELD-X to try. Along with various flavor of 80, 87, & 95grainers. That’s the ‘wheelhouse’ the .240Redline is being built around...
FYI, feel free to ‘comment’ where the vids are posted. Dave shares lotsa ‘no nonsense’ wildcat knowledge. I find myself going back to re-read articles, often...
Take care!
Fredo -
Howdy !
Thanx for the video info. I'll be sure to check 'em out !
With regards,
357Mag
What's a safe RPM range (in your experience). Obviously you'll be pushing those bullets at max speed.
Fredo -
Howdy !
I did make it a point to go back and re-review your vid's.
Cool beans !
On one vid, the groundhog carcass appears to " smoke " for a bit; after the initial "mist " had disipated !
That's a new one, on me !!
WIth regards,
357Mag
snert
Silver $$ Contributor
Mag,
There are a bunch of "firsts" I saw with the Redline. I'd never seen a lateral "three roll" nor an end over end roll on bullet impact. i've seen a Swift loft parts of groundhogs twenty feet in the air, but the sheer energy dumped on a carcass by that 70 grain mover is a sight.
I went back and you are right, the Redline "schmokes em" as Fredo says!
There are a bunch of "firsts" I saw with the Redline. I'd never seen a lateral "three roll" nor an end over end roll on bullet impact. i've seen a Swift loft parts of groundhogs twenty feet in the air, but the sheer energy dumped on a carcass by that 70 grain mover is a sight.
I went back and you are right, the Redline "schmokes em" as Fredo says!
Snert -
Howdy !
Yeh.... I've had 'em go a few feet sideways..... due to a good energy dump into the groundhog.
The Hornady .224" cal " 55SX " goes in and does its thing. No exit.
Made a hit on a groundhog standing in his hole 100yd out, visible from the chest up.
Made a solid chest hit using the 55SX shot out of my 24" .22-35 Remington wildcat.
The carcass rocketed straight up out of the hole....... did a lazy arced backflip..... and landed on the ditch bank 6' above the hole, and in back of the hole 6-7 ' . Dead'er than next Tuesday.
With regards,
357Mag
snert
Silver $$ Contributor
Now THAT is air time!
Best graphic I ever saw was a 55 grain vmax from a Swift at 130 yards. back of the noggin hit lifted the 'top plate' and sent it twenty feet up like a frisbee.
Best graphic was a similar hit, same gun, that turned just the skin inside out from shoulders up, and only thing attached was tip of nose. looked like a sock sewn on the tip of the nose, with all the innie on the outtie.
Terminal ballistics are a study, eh?
Best graphic I ever saw was a 55 grain vmax from a Swift at 130 yards. back of the noggin hit lifted the 'top plate' and sent it twenty feet up like a frisbee.
Best graphic was a similar hit, same gun, that turned just the skin inside out from shoulders up, and only thing attached was tip of nose. looked like a sock sewn on the tip of the nose, with all the innie on the outtie.
Terminal ballistics are a study, eh?
Snert -
Yeh.... those .224" cal 55gr varmint bullets @ hyper velocity + close-in are " terminal ", fer sher !
Great stories !
With regards,
357Mag
John, can’t really generalize to any extent.
Obviously, a min. RPM is required to ‘stabilize’ any given bullet. And the bullet itself ultimately sets max. limiting factor for RPM. Berger’s stability calculator is a great tool to figger a min. RPM (twist rate)...
As for max, both my .17Predator and .22-243AI run at slightly MORE RPM than the .220Redline, in the ~325K range. Based on the few examples alone, thats ALOT to ask of any bullet, so I don’t wanna rev any more that that. And the .240Redline will be well below that...
msalm, no sir, no desire to melonite.
Just curious. Sounds about what I'm getting in an 8 twist .224. Right around 320K. Luckily no bullet issues...Yet ! I've been surprised hearing some guys running faster twist barrels in the 350K range and no issues. Just a matter of time and barrel wear. The 9 twist helps alot in your .220 RL for sure.
Fredo-
Howdy !
Great to hear from you !
Glad to read about your progress on the " .240 Redline ", AND that you were able to accumulate the
components !
" Closer he stepped ...... "
This is THE project I enjoy reading about the most.
With regards,
357Mag
nakneker
Gold $$ Contributor
Thanks Snert, I appreciate the info!
The 243 necked down to 224 has been done since the beginning of time...well since Winchester brought it out in 243 ...same for the 6mm Remington necked down and both Ackley improved...Sierra had loading data for 22- 6mm Ackley 20 yrs ago in their manual, faster twist for long bullets of the time...really old, 224 Middlestadt was one of the old ones, along with 224 cheetah Jim Carmichael...nothing new.
RPM, some hold together at 400,000 rpm some don't.
17 Rem 4900 fps 9 twist 15.5 all copper no problem 392,000 rpm 58 gr Vmax 4100 fps 7 .5 393,600 rpm twist no problem.
The 3 twist in the 8.6 Blackout is a problem...285 eld don't make it to 50 yds at 1450 fps, 348000 rpm, failed...disappointed in that big heavy target bullet. It must have a thin jacket. A few leads bullets will make 50 yds at 1600 fps inching up to 400,000 rpm The 225gr interlock will blow up inside tbe muzzle brake, as soon as it leaves the confines of the 3 twist barrel, at 2100 fps, 504,000 rpm.
All copper bullet appears to be required much above 1200 fps for certain arrival to the target...will try them soon, to see if they can handle 504,000 rpm. This is a subsonic only or slightly above caliber for most lead bullets.
RPM, some hold together at 400,000 rpm some don't.
17 Rem 4900 fps 9 twist 15.5 all copper no problem 392,000 rpm 58 gr Vmax 4100 fps 7 .5 393,600 rpm twist no problem.
The 3 twist in the 8.6 Blackout is a problem...285 eld don't make it to 50 yds at 1450 fps, 348000 rpm, failed...disappointed in that big heavy target bullet. It must have a thin jacket. A few leads bullets will make 50 yds at 1600 fps inching up to 400,000 rpm The 225gr interlock will blow up inside tbe muzzle brake, as soon as it leaves the confines of the 3 twist barrel, at 2100 fps, 504,000 rpm.
All copper bullet appears to be required much above 1200 fps for certain arrival to the target...will try them soon, to see if they can handle 504,000 rpm. This is a subsonic only or slightly above caliber for most lead bullets.
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