Most Accurate Mag Fed Cartridge at 100 - 300 Yards?

[potatoe]

what? PPC turning barrels into kitty litter?

 

[chevytruck_83]

what? PPC turning barrels into kitty litter?

I purchased a 6 ppc off Clarence hammonds and he said typically you'll get around 1000 rounds down the tube before accuracy falls off. Everyone has there own priorities but to me not shooting competitions it's not worth even taking it out. Anyways. Sorry to stray the op's thread off topic. Mag fed cartridge I like the 223.

 

[potatoe]

I don't think we are straying too much (hopefully not OP if so sorry) Hammonds and many other renowned blank BR shooters are chasing, getting beat/winning by .001's or less sometimes thats why they will say it drops off after such a short life. The term "shot out" or "drop off" is objective. A cartridge shooting 30 gr or less powder with a sub 70 grain bullet is not a barrel burner in the least. I've shot PPC's upwards of 2k with most if not all trips leaving with a .1 group every trip to the range, a .3 is horrible with a PPC

Phil I'm just throwing my opinion in, I've had .223's, 6br's , 6 dasher's and 30br's. For paper punching I would always go back to the 6PPC out to 300yards, the bullets are cheap lack of recoil and my favorite cartridge out to 300 . . .buy once again these were just single shots and you said you want a repeater but I'm just sayin'

 

[chevytruck_83]

I don't think we are straying too much (hopefully not OP if so sorry) Hammonds and many other renowned blank BR shooters are chasing, getting beat/winning by .001's or less sometimes thats why they will say it drops off after such a short life. The term "shot out" or "drop off" is objective. A cartridge shooting 30 gr or less powder with a sub 70 grain bullet is not a barrel burner in the least. I've shot PPC's upwards of 2k with most if not all trips leaving with a .1 group every trip to the range, a .3 is horrible with a PPC

Phil I'm just throwing my opinion in, I've had .223's, 6br's , 6 dasher's and 30br's. For paper punching I would always go back to the 6PPC out to 300yards, the bullets are cheap lack of recoil and my favorite cartridge out to 300 . . .buy once again these were just single shots and you said you want a repeater but I'm just sayin'

Absolutely. Out to 300 you'll be hard pressed to beat the 6PPC for pure accuracy. If someone would design a magazine that would load a 6ppc reliably they would be filthy rich.

 

[swd]

Purpose is strictly non-competition paper punching. 6PPC is probably best accuracy, assuming reliable feed, but wanted something simpler to reload for.

Sako PPC repeaters are out there and Norma makes factory 6PPC brass. That would be about as accurate and easy as it gets.

 

[sofarfrome]

Personally, I see a somewhat self defeating result in using a magazine to feed your ammo and achieve the best seating depth that improves accuracy. There is a reason why most Bench Rest competitor use a single shot rifle. And this applies to magazine fed rifles. And that is because you are restricted from going beyond a certain loaded cartridge length (oal) because of the walls of a magazine. In other words, if you find your most accurate loads are seating the bullet longer than a magazine would allow, you are having to settle for LESS than your most accurate load. Now I'm sure there are a FEW experts (such as Boyd suggested) who'd be able to figure out a way to perhaps make a magazine work. But obviously, the top winners at competitions are using single shot rifles that allow them to load/seat to where the rifle performs the best. From a personal observation standpoint, that is why I load all my Benchrest rifles one cartridge at a time because the OAL would not be achieved using a magazine, which a few of my rifles actually have. And in recently testing new custom AR built for precision and accuracy shooting, I found my best seating depth (& OAL) could not be maintained when using a magazine and the result down range was obvious in group measurement. Good enough for some..maybe. Best possible grouping for me...absolutely not. Just my .02 worth.

Alex

One will have to determine what datum to use to identify the accuracy potential. From an OAL length perspective you would need to determine the best "jam length", if any at all. What would be the datum? Or starting point? Would it be the shoulder neck junction to the rifling? The body shoulder junction to the rifling? The case head to rifling distance to the rifling? Any dimension could be achieved by the depth of cut of the reamer and length of throat. Some attention will need to be paid to the design of the magazine lips, loading ramp, and bullet configuration, including some other geometric considerations I may be over looking, like lead angle. It would take a lot of testing per barrel to come to an acceptable configuration. By the time you figure it out the barrel may be past its useful life. I am assuming that is why a "repeater" to be fed by a magazine is not used for the high precision game of benchrest. Shooting across the course is hugely different than trying to shoot all bullets into exactly the same hole.