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Post by bzikot on Jan 5, 2015 5:56:11 GMT -8
Yes I am a long barrel guy as well. I figured that was the case but just had to ask. Really looking at build an A 30 some time down the road.
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Post by GLSHOOTER on Jan 5, 2015 10:17:43 GMT -8
Yes I am a long barrel guy as well. I figured that was the case but just had to ask. Really looking at build an A 30 some time down the road. You've arrived at the Mecca of A-30 information. Hurry up some time! ! Greg |
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Post by GLSHOOTER on Jan 6, 2015 9:57:30 GMT -8
I got a call last week from Carl that his current project was to load up some subsonic ammuntion for the American 30. He made a couple of range trips and sent me some pictures of the loaded ammuntion. These are 200 grain Bear Claws. The rifle was a 16" Black Hole barrel. No changes in the gas port or the gas block. They tried two or three powders and ended up with excellent fuinctioning from the magazine. The goal is to make available commercial subsonic ammuntion to be partnered with the standard ammuunition that will hopefully be relased by SHOT.   Greg |
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Post by tcjohnson7 on Jan 23, 2015 23:14:34 GMT -8
What is difference between 16" and 20", or how many fps loss or gain per inch 20-25?
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Post by tcjohnson7 on Jan 23, 2015 23:16:11 GMT -8
Oh yeah got decide before tomorrow 20 % off shot show special ends 1-24-2015 see promotion page for promo code.
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Post by GLSHOOTER on Jan 24, 2015 5:53:24 GMT -8
What is difference between 16" and 20", or how many fps loss or gain per inch 20-25? I figure 30 on my calculation but YMMV. One batch of loads was 27 FPS IRRC but of course that will be powder specific and cannot be a blanket figure. Greg |
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Post by tcjohnson7 on Jan 25, 2015 13:57:42 GMT -8
So difference is 27 fps per inch moving up from say 16"? 308 and 3006 gain/ loose about 25fps from 22-24" barrels.
I ordered the 16" barrel after reading this post thinking handy barrel more valuable then few extra fps since going above 20" didn't gain much.
Is lil gun giving top velocities or is there a favorite powder here for 125gr and then 150gr? What powders for 200 gr.? any work with 200gr to see top supersonic speeds?
Tim
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Post by GLSHOOTER on Jan 25, 2015 14:41:29 GMT -8
So difference is 27 fps per inch moving up from say 16"? 308 and 3006 gain/ loose about 25fps from 22-24" barrels. I ordered the 16" barrel after reading this post thinking handy barrel more valuable then few extra fps since going above 20" didn't gain much. Is lil gun giving top velocities or is there a favorite powder here for 125gr and then 150gr? What powders for 200 gr.? any work with 200gr to see top supersonic speeds? Tim Yes that is what I said but that was that powder. I can';t recall which it was but that's pretty reperesntative. This case is som much smaller than the 30/06 and 308 can not be used as a compariosn in any area other than bore diameter. We have shot very little LIL'Gun in this one. What I have shot is extremely spiky and violent. I would approach from a very low level with caution. I smoked my first primer out of a case using it and I thought I was conservative. No work on supersonic 200's was done on purpose. The 200's have been done by Carl and his loocal guys. Ritch and I have not shot any. I have no need but who knwos what the future holds for my gun safe. We have concentrated oin mainstream usage not the niche market. For the subs IMR4227 and RL-7 have been doing the deed for Carl in a 16" gun. RL-7 and RL10 seems to be the GOTO powder for the 125's. For the 150's my 16" gun loved AA 2015. All Rem 7 1/2 primers/ No crimp. Greg |
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Post by tcjohnson7 on Jan 26, 2015 19:04:40 GMT -8
I was comparing this to development of 7.62x40 wt over on Wilson combat a 223 cut down to use 30 cal bullets. In his development in that 60+ page forum on ar15.com page
25 , particularly page 17, and loads page 10, 762x40 poster, he found an interesting power node so to speak. With 11-14" barrels, carbine gas, with lil gun, he was able to make major power easier then longer barrels and his top velocities were with lil gun in 11" barrel. The velocities without over pressure were much higher then anything by some margin. He gives loads on earlier pages.
Just wonder if any development work had been done on shorter barrels with this powder lil gun.
Thanks.
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Post by GLSHOOTER on Jan 26, 2015 19:35:26 GMT -8
No it has not been used in short barrels. Do not delude yourself into extrapolating data from a 223 based cartidge with the A-30.
As I stated the Lil'gun I have personally shot was very spiky. If you wish to try it please pass on your experience. We as a group don't intend to go down that path.
We've been shooting this in one form or another for almost a year. This is like nothing on the market. It's a ground up development. Hopefully you'll try one out. Keyboard research is no substitute for hands on experience.
Greg
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Post by Master Yoda on Jan 26, 2015 22:29:32 GMT -8
At shot show we were shooting it out to 500 yds with good success
we mixed sub sonic and super sonic loads for people to shoot
lots of smiles
A note on powders: I am receiving several pounds of new powder not yet on the market. This powder was designed around the 30 BR family of cartridges and we are very excited to give it a try.
It will take several weeks to get and test so stay tuned.
Carl
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Post by tcjohnson7 on Jan 28, 2015 17:50:34 GMT -8
Can you give maximum overall bullet length in normal magazine and then maximum length in windowed magazine that will feed, to see what family of bullets this New 30 American can shoot? There is a great site: www.jbmballistics.com/ballistics/lengths/lengths.shtmlthat lists a large number of bullet manufacturers bullet lengths. Thanks. |
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Post by GLSHOOTER on Jan 29, 2015 5:45:41 GMT -8
Can you give maximum overall bullet length in normal magazine and then maximum length in windowed magazine that will feed, to see what family of bullets this New 30 American can shoot? There is a great site: www.jbmballistics.com/ballistics/lengths/lengths.shtmlthat lists a large number of bullet manufacturers bullet lengths. Thanks. Max Mag lenght for ASC is 2.314 + or -. For window mags figure 2.40 and for a custom lower available I beleive it is 2.435. Some bullets may reach the lands , like the 110, in as short as 2.110 COL. You must tailor the COL to the bullet. Ogive placement is the issue in tandem with the actual lenght of the bullet As a rule of thumb any 150 or below wil be fine if the ogaie is short enough from the tip. Other large bullets, like the 200 grain Bear Claw mentioend are good. This is not a good one for the long VLD's outthere like Berger makes. The JBM site is full of good data but unless certain critical measurements charts are given they are worthless. This is what I was referring to as keyboard research. I printed that chart out two years ago. Nice for an application or two but in this case totally worthless. We're a barrel maker and can assist in getting the customer started. We aren't going to atempt to be Sierra or Hornady. We aren't going to drawup and post large charts. The barresl are well receieved. the A-30 spefically is going crazy, and in this case unless specifics are asked we are not going to do a shotgun approach to data. We doen't sell shotguns. We sell precision rifle barrels. Greg |
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Post by tcjohnson7 on Feb 2, 2015 14:54:43 GMT -8
It is good to feel stupid from time to time. I completely forgot about ogave , the curve of the bullet. This is the problem with 75 gr Amax in something like 22x6.8 and in my own 357 sig. The short neck on 357 sig means you have to shop for 357 sig bullets with modest curve or ogave because neck is so short any curve will not allow good neck tension on the bullet.
Still I see by the picture that Sierra 150gr (gameking???) seems to fit.
Thanks for the info.
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