After much consideration, I deleted this post in an effort to avoid offending the delicate sensibilities of the self styled arbiters of Internet etiquette who are lurking about the forum.

Many thanks to those of you who chose respond with your valuable suggestions instead of being so form conscious.

Good Shooting, HBB

[ 01-10-2003, 06:16: Message edited by: hillbillybear ]

Why not call it the the 224 BarrelBurner because that what it's going to do. I'd say maybe a few hundred rounds of life.

The .240 Incinerator that I built back in 1990 can push a 100 grain bullet at 4,000 fps......the only thing is that it took a 28.5" barrel to accomplish this.....don't know if you want the gun to be that long (.240 Incinerator is a .264 Mag necked to 6mm; 45 degree shoulder and minimal body taper; very similar to the 6mm Mach IV).

Lee Martin
www.singleactions.com

I've been tinkering with the other end of the scale, being more of a 'big bore - modest velocity' fan. My latest is a .50-06 design that looks very promising, one we get past the difficult extraction...

Other than replacing barrels often, here�s another problem - at 4,000 fps, most small bore hunting bullets will simply shred on impact - that is IF they even make it to the target. Better consider a solid, mono-metal bullet for this purpose. Prepare yourself for considerable meat damage, then again, deer tail soup is not so bad.

Hillbilly,

This same post is in at least two other places here. Enough is enough OK?

I've found accuracy to be excellent with the .240 Incinerator.....using 75 grain bullets at 4,200 fps I've had multiple 3-shot groups in the 0.3" to 0.4" range. If you account for the proper twist rate, there's no reason why a "faster" bullet would compromise accuracy/precision. The .22-250 is a speedster and has for years been a tack-driver when coupled to a sound rifle. I agree that bullet design is important, but there are a few 6mm's that will hold-up to these velocities.

Lee Martin
www.singleactions.com

Could we try to stay with a subject related to the title of the forum?

Good Grief! I just went to Gunsmithing and here this topic is again!

[ 01-09-2003, 21:04: Message edited by: Elkslayer ]

First you need to ask yourself what you want the rifle to do. If what you are looking for is long-range (800 yards plus) performance..both flat trajectory and the ability to "buck" wind...then you need to use bullets that are long for their caliber and the necessary fast-twist barrel. Take a look at what the 1,000-yard shooters are using and you will get some idea of calibers and gun modifications ....and...forget about the Leupold scope you want a Nightforce.

If you are just looking for hyper-velocity because you have a "need for speed" that's another story...the best suggestion I can make is that whatever you do have your gunsmith set up your rifle as a "switch-barrel" and have him chamber and fit at least two barrels at a time and schedule to have him send you two new barrels periodically until you either run out of money or return to reality.

A quick run though on a computer reloading program I've got. Say's with a .300 ultra mag parent case necked down to .243, stuffed with 90gr of IMR4320 would shoot a Sierra 100gr BTSP @ 4080fps out of a 31" barrel on a 70deg day. That said, I wouldn't recommend it. TC

[ 01-09-2003, 21:18: Message edited by: TC1 ]

7 REM case seem o be the max water capacity tp launch 6 mm bullet over that you get serious problem of burning rate powder , very slow powder ( as canon powder ) doesn t like small bore and you get several problem as
coarse powder
heavy graphite powder make lotof gunk in the barrel = carbon fouling
very slow powder is very difficult to ignite with regular boxer primer .
heat make th powder burning make three shots group max capability .

but a 6 base on 7 REM MAG case or WSM can be fun if well design ( not to sharp shoulder ,good design neck shoulder radius .... )
and solid bullet toavoid any accurcy loose by offcenter unbalance core .
and dont forget to take the right pitch to not overspin your bullet

good shooting

DAN TEC

I just ran TC-1's load( many thanks TC_-1) for the Sierra BTSP thru my ballistics program here are the results.
A very impressive load
Range Velocity Impact Drop ToF Energy Drift
0 4080 -1.5 0 0 3696 0
50 3931 0.02 0.34 0.04 3431 0.55
100 3796 0.96 1.25 0.08 3200 0.9
150 3665 1.31 2.76 0.12 2983 1.49
200 3538 1 4.93 0.16 2780 2.32
250 3415 0 7.78 0.2 2590 3.41
300 3295 -1.75 11.39 0.25 2411 4.76
350 3178 -4.3 15.8 0.29 2243 6.39
400 3065 -7.72 21.08 0.34 2086 8.32
450 2954 -12.07 27.28 0.39 1938 10.54
500 2846 -17.42 34.49 0.44 1799 13.09

HillBilly, as several good poster's here and on other forums and BB's have tried to point out to you it's considered "bad form" to post the same thread on the same BB on multiple section's... JUST LIKE TYPING IN CAPS IS CONSIDERED "YELLING"... Posting the same thing in multiple places "water's down" the discussion and ultimately makes to a poorer discussion... I'm sure your intentions are the best, but I've got to say this is getting a bit irritating