Scale Models

[mcwoodduck]

If the 50 BMG is a sclaed model of the 30-06 and the 380 Auto is too a scale model of a 45 ACP.
What ctg would you like to scale model?
I ask only because the idea of scale modeling a 22-250 to shoot 338 bullets makes all the dimensions about 1.5 and then the same idea of taking a 22-250 and scaling it to 416 at 1.8 x the same size seemed a little silly.
But let's say scalling 308Win to 224 bullets would almost make 221 Fire Ball. 

[Bull45cal]

I want to scale the 308win to 40mm.  Now that is a rifle cartridge.  Then you could snipe those pesky T-72's out to a mile.

[Bull45cal]

mcwoodduck,
     In all seriousness, the .308 scaled down by 1.375 (to get to .224 bullet diameter) would have a case head of 0.344.  So, that would put it well under the 0.378 of the 221 FB.  I don't know what that would equate to in current cartridge.  I guess the 221 FB would be the closest to use. 

     I would like to scale up the .223 Short to 30 cal.  That would make a case length of 1.561, with a head diameter of 0.52.  I could use the 8x68S case as a base, since it has a case head of 0.523.  That should make a good medium range deer cartridge that would even be legal in Indiana.  That would give a total case capacity of 46.5gr of water, with  41gr. below neck.

[briannmilewis]

Shane, the 223 Short opened up to 30 cal, would that be 223/300 Whisper?

I am thinking of asking Larry to make my 223 Short chamber "bench rest" spec, then we can have two versions running at the same time. The shoulder would start 0.803 from the base and the shoulder would 30 deg.



I really hope we can get our 223 evaluations finished this year.

Brian

[Bull45cal]

"Shane, the 223 Short opened up to 30 cal, would that be 223/300 Whisper?"

No, that would be a 30/223 Luger.  I think that would be a more fitting description.

Was your question referencing where I was talking about "scaling up" the .223 short?

[Bull45cal]

Brian,

     Why a .223 Short BR?  I thought the 221 BLBR (Brian Lewis Bench Rest) was a much more reasonable venture.  The 223 Short is just a little shy in velocity for BR work, I think.  After making brass and shooting the .223 Short for a while, I think you would be happier with the 221 BLBR for bench rest competition.  That give you the extra long (.313) neck you wanted, without sacrificing that much velocity.  Just my 2 cents.

Shane

[briannmilewis]

Shane: I just emailed you in agreement with that, for all the same reasons. It is not that I want to do BR shooting, just interested to know if doing a "BR" makeover could really effect the 221 FB accuracy. If it did, then we could apply it to target or varmint shooting. That would be a double win. I know there are plenty of variations of the 221, neck up, neck down blah, blah, blah...there is probably an improved version according to Ackley specs. I would also like to do the BR makeover of a regular 223 cartridge to see if that can be improved upon.



This would be easy to make from 221 FB brass or 223 Rem once fired. What is good about it is if we used 221 FB brass there would be no case trimming, just let the case length be whatever it is when the shoulder is set back.

[briannmilewis]

But let's say scalling 308Win to 224 bullets would almost make 221 Fire Ball.

OK, I am guilty of looking at this more closely based on the original idea of scaling everything to do with a cartridge...length, diameter and bullet diameter.

A 6.5x45 (223 case) is an 86% scale of a 308 Win.

A 6.5 BR is a 91% scale model of a 6.5 WSSM.

A 260 Rem is a 94% scale model of a 284 Win.

Also a 7x45 (223 case) is almost an 86% scale of a 338 Federal.

A 6x45 (223 case) is an 86% scale of a 7mm-08.

A 20 Tactical (223x204) is almost an 86% scale model of the 243 Win.

A 223 Rem is almost a 70% scale model of a 30-06.

A 22 Hornet is almost a 70% (68.8% - 72.7%) scale model of the 30-30 Win.

A 327 Federal is an 87% scale model of the 357 Mag.

A group of 86% scale models and their parents, plus the 223 and 30-06 would be good caliber coverage I think.

Musings...