My love hate with a Ar9

[fiver]

and if they are landing in the same area that's a good sign.
I'm another 'not a tightgroup fan in the 9mm', if the bullet moves in just a little the pressures get stupid high real fast.
I like it in lot's of other places, just not the 9, but I like the other faster powders in the small 9 case.....
red-dot, tite-wad, Bulls-eye, etc.

 

[Brad]

I would prefer they stay closer to home. Brass that flies farther means it scatters more.

If it feeds, goes bang, and is accurate enough who cares about how far the brass flies?

 

[Tomme boy]

I was getting a 50fps swing. One thing I did not like was you know when you are shooting a 22rf in a rifle and you can hear the different speeds from a lite charge? Well this would do this on the swing to the low. Otherwise they were staying about 15fps ES if you took out the ones that were 50fps.

I have never had as much trouble with a 9mm as I have had with this AR. Part has to do with the powder coat. I know that. And the 7" barrel I have for this is a lot better. Not as fussy with what it likes. I might just switch it back and to heck with the brace ban that might be coming.

 

[RicinYakima]

SR7625 is a target pistol powder. It is peaky if you try to load it hot. However, it was very low SD and ES if you are a believer in chrony numbers.

 

[Winelover]

Didn't realize the AR 9's are so finicky. Now, I'm glad I purchased the CZ Scorpoin carbine. It too is a blowback, the bolt is massive. Recoil/buffer spring is inherent to the bolt. I have over 5K rounds thought the barrel, all hand loaded. Most of it cast, some plated and some PC. Have tried powders from Red Dot (fast) all the way to AA #7 (slowest) and many in between.........BE, AA#2, W231, Unique, Power Pistol, N340 & True Blue. None had any issues, except in the accuracy department. Never ruptured a case. Cast bullets ranged the gamut from 115 grain to 150 grains. BTW, I use almost any brand of brass, including S&B.

If I had to chase brass, I wouldn't be shooting it as often as I have. I modified a brass catcher, purchased many years ago, for my AR-10. E&R Enterprises out of Oregon, IIRC. Occasionally, a case will get caught when the bolt closes due to rebounding off the hard plastic brass catcher. Only the trigger is aftermarket. No springs were ever changed. BTW, CZ also offers it in pistol configuration. The son of the LGS owner has one and recommended the CZ carbine, rather than the Beretta Storm, I was considering.

 

[fiver]

I gotta throw a chuckle in here.
the only issue I have ever had with my Hi-Point carbine is the front sight screw come loose after I didn't tighten it enough, and the sight lowered itself back to the bottom where it started.
that stupid thing will feed flat point bullets barely sticking out of the case [,098 oal] with about an 80-85% meplat.

 

[Tomme boy]

A friend is also been having issues from contacting him today. He has been having issues also. We were talking and we both are now getting into primers that were made back in the last shortage. I am going to change to some newer ones made last year. To see if things change.

 

[CWLONGSHOT]

I was getting a 50fps swing. One thing I did not like was you know when you are shooting a 22rf in a rifle and you can hear the different speeds from a lite charge? Well this would do this on the swing to the low. Otherwise they were staying about 15fps ES if you took out the ones that were 50fps.

I have never had as much trouble with a 9mm as I have had with this AR. Part has to do with the powder coat. I know that. And the 7" barrel I have for this is a lot better. Not as fussy with what it likes. I might just switch it back and to heck with the brace ban that might be coming.

I have a spare 16" 9mm Ballistic Advantage AR bbl if ya wanna try Tommie.
I bought two to do a 357 sig project with a old employee of mine. But its been three years now and it aint happened.
Im in search if a gun smith who can chamber a 9mm barrel to 357 sig....
ya wouldnt think it a issue... Anyhow LMK.

CW

PS. I also have a ton of 9mm brass so ya dont need chase all that goes astray.

 

[Winelover]

Here's an idea on how large/heavy the CZ Scorpion's bolt is.





Pretty good size chunk of steel. The fastest powder I tried was AA#2, with a NOE 136 RF, at 3.2 grains. My target notes say all cycled but report sounded like a pop gun............so I didn't go any lower.

 

[Ian]

I was gonna mention the Hi-point carbine but its Achilles heel is magazines, as in anything other than the 7-round Hi-Point factory mags have problems. Iirc the bolt of the 45 ACP weighs two pounds, the 9mm nearly as much....but they WORK.

 

[Cherokee]

My HiPoint has been 100% reliable and accurate. But that mag, don't understand why they haven't switched to a hicap mag. My Ruger carbine has been 100% reliable and accurate, easier to shoot than the HiPont. Love the 30+ rd mags. I haven't had any of the problem mentioned in this thread. Use HS6 & WST for 1000+fps level loads.

 

[RBHarter]

I was worried about mags after I ordered the 14 round Pro Mags for the High Point 45 ACP ......it was for not , the thing is still a garbage disposal . If it'll move free in the mag it feeds and fires .

 

[Tomme boy]

I had a first gen hi point rifle in 98 or 99. It fed and shot everything perfect. The only thing that was bad was its split stock. It would flex enough to open it just enough to grab your whiskers and rip them out of your face. It was a 9mm also.

CW, I am fine. I also have more 9mm brass than I and 5 guys will ever use. I always pick it up at the range because there are too many guys that are going there just to get brass to scrap. The problem there is I have WAY too much brass to deal with and I have to take it to the scrap yard. I have been sorting some of it to get the crimp primers out of them. 7.62 is the only crimped brass I am saving. Most all the good brass I have sold off over the years on several forums depending on what it was. The last shortage I sold over 60K pieces of 556 mixed over at snipers hide. $75 delivered for 1K

 

[Winelover]

Only mags available for the CZ are the factory 30 rounders. Retail is $20 each. I rarely load over ten, though.

 

[Tomme boy]

PSA has their mags for their ak9 that work in the cz75 scorpion.

 

[Tomme boy]

Went to the range today to try some changes I made. I put the 7" barrel back on. I also took my 8 oz. buffer and made it into a 6.5 oz buffer. I bored out the inside to a 1/4" from the end. I then put in about 1 1/8 oz of lead shot. Put the plastic buffer end back on. I then turned the heavy end down to the same diameter as the long end down and left about a 5/16" flange. It came out exactly 6.5oz. The shot inside was to make it act like a regular buffer.

I also loaded the shells with 4.2gr of power pistol. I did not bring my chrono with me this time so no numbers. The whole recoil impulse was different. Way smoother. It ran perfect.

Now hopefully the ate doesn't go ahead with the brace ban. I really like this as a pistol over the carbine.