Anyone seen the 17 rifles that shoot 22 lr ammo?

[stuporman]

I was checking out a Savage .17 at a Pro-Shop down in Port Allen, LA.

Decided I was gonna look up how much 17 ammo reaaaaalllly costs, tripped over an interesting concept rifle.

Shoots 22 lr, but manufacturer claims "the bullet forges itself during firing to .17 caliber at extremely high velocities"

Anybody seen one?   I mean the thing has gotta suck.

http://www.angelfire.com/ks2/gunranch/17_cal.htm

 :shock:

[jh45gun]

The only way I could see this even beginning to work would be to taper the bore to gradually squeeze the bullet? I do not think it would be a great shooter and sounds like some one trying to get on the 17 bandwagon cheap. First of all the 17's all have premium bullets and are costly because of the quality. What kind of quality will there be in a lead wire going down the bore as that is what you would have and I do not see that competing with a precision made bullet. sounds kinda goofy to me and I cannot even begin to wonder what the pressure would be even for a 22LR? It does not rock my boat :roll: Thanks for bringing it up though kinda interesting if not strange? Jim

[BlkHawk73]

I think I'll pass on that concept.  If someone wants a 17...just buy one (or a bbl for your current .22)  So this would be kinda like fire-forming but for bullets instead of cases.  

   On a better solution to this idea, Volquartsen has out a new switch-bbl 10/22 style rifle.  .17HMR/.22Mag  
   
www.volquartsen.com

[stuporman]

Man, I wish I had $700 for a volq 17.

Wait, they may be even more than that.

I may get a Cheap-o Savage to see if I like the round.

 :shock:

[Chuck from arkansaw]

I read about it over on shooters.com.   I havn't found much about it, but apparently it works and is safe and accurate.

[KN]

This thing has been around ror severall years, Originated in austraillia or some place. Never took off for obvious reasons. Got to be one of the dumbest ideas I ever heard.  Just my $02.   KN

[Nobade]

It is indeed from Australia, is called the .17 Myra Extruder, and works quite well. It increases the velocity of a .22LR quite a bit over normal. The only problem is the twist - a 40gr. .17 cal. bullet is fairly long, and needs a much quicker than 1:16 twist to stabilize it properly.

[KN]

How could it possibly increase the velocity after using a fair amount of energy to reduce the diameter and still be pushing a 40gr projectile. Defies all the laws of phisics. I would have to see it to buy that.  KN

[stuporman]

If you release a volume of gas through an opening of .22 cal, it goes a certain velocity.

If you release it through a .17 cal opening, it does indeed move at a higher velocity.  There is the same amount of gas trying to get through a smaller hole, so it moves faster.

The friction and "extruding" of the bullet would definitely consume some energy, but lead is very soft...so I do not know how much it would affect.

Anybody here got one?

 :shock:

[KN]

If all we were talking about was gas then I would agree with the theory. But we are talking about pushing a projectile down a barrel. Both weighing the same but now the extruded 17 cal has a considerable more surface area draging down the barrel than it did when it started. Plus the loss or energy to extude it. You only have X amount of energy to start with, and constricting the flow is not going increase it any. Lets take the 17HMR for example. Do you think it would have a greater velocity than a 40gr 22mag if it were loaded with the same powder charge but used a 40gr 17cal bullet instead of the 17gr? The preasure would indeed spike higher but the surface area on the base of the bullet is smaller offseting any increases of preasure. This is only my opinion of course.  KN

[stuporman]

I was just trying to figure it out loud...youre right on all counts.

I do know that hydrodynamic (misleading term, applies to air as a fluid too) rules say there is more energy generated/released through a high velocity, constricted vent than a larger one.

This is cuz of the 'ole e=mv2 rule.  Same volume of gas, one let out through a big opening vs. a small vent over the same time period....
e is upwardly proportional to the square of the difference in velocity.

Just cuz its possible, dont mean its a good idea though!

 :shock:

[KN]

Yeah, I never have figured out what kind of nitch that idea was suposed to fill. Oh well, to each his own I guess.  KN

[rodgervich]

A friend of mine made one of these swager barrels and it is a neat little "novelty" item. He ground a 22lr reamer down to a 17 cal pilot (.168") and as long a taper as he could fit on the reamer and chambered a 17 caliber barrel blank with it. Put it on a 10/22 since it's so easy to do and went out shooting. As I recall the greasy lead bullets worked better than the copper plated by only a little bit. The velocity was just a little faster than the 22lr that it replaced, probably would be faster with a bolt action but who knows. Accuracy was about the same as a 22lr at the same ranges. He recovered some bullets from water jugs, they were pretty neat! About 3/4" long with little mushroom heads from the hollow points. He still has it but doesn't shoot it much, it was a neat project but not any advantage over a 22lr, except he could say he made it himself.

[TravisM.]

The "Broken Gun Ranch" sells a barreled reciever for the Ruger MKII pistols that shoot .22 ammo from a .17 bore. I don't know, maybe Im a sissy, but I've heard way too many horror stories about people accidentally shooting larger bullets out of smaller bores.
There are a few other companies offering this service.

[vmaxx]

Winchester 22 mag ammo has a copper jacket. That sure wouldn't make it out the other end.