Summary:
At 100Y Gen 2 avg. was 0.626" with a velocity of 1,099fps, SD of 5.9, ES of 22.9 taken over 46 shots. Better than my Semi-Auto Benchrest Precision (SABP) "control group" (which is my current go-to at 0.738-1.75" (but weird things happened Sunday with the SABP that I think opened it up a bit from what I'm used to during testing which I'll explain below).

Result
Needs more testing as the slow fire vs rapid fire strings were more than a little disconcerning having almost 3/4" INCREASE in group spread on the slow fire(?, which seemingly should be the opposite). If the groups end up being accurate though, the $7-8 per box price increase over SABP would buy me just under 1/4" reduced group sizes. So $8 to go from just over 3/4"down to just over 1/2".

Testing Details
Let me preface this by saying I definitely wasn't feeling "steady" on any of these. Only time I had a chance to test was during a Recreational Rimfire Match at my club last Sunday. I arrived almost too late to shoot cause I had to chase down the Fedx guy in my neighborhood delivering these from Killough because Fedx missed my scheduled delivery date (was supposed to be Sat. so I could leisurely test these all weekend). Arriving at the match I ended up rushing to get my equipment setup, put out my targets, get my gear in order, etc. and even during the barrel conditioning shots I could tell I was waggling more than usual off a bench, where I usually like to shoot testing stuff like this relaxed prone on a mat.

Rifle is a Bergara B14r with DI Precision 24" barrel with a Stiener T6Xi set at 30x in an MPA JAE Gen5 stock, shot off an Atlas and rear bag on a wooden shooting bench. Conditions were: 91 degrees F/29.3Hg/59% Humidity.



Keep in mind although this is a 50Y UIT Smallbore target I was shooting these at 101Yards.
First Volley: 5 shots on each except for 4 shots on top left target as I miscounted. Top 2 slow fire targets I had 10 minutes time to complete. Bottom two targets are Rapid Fire, 5 shots in 30 seconds. Last lower right target I made a 0.1 click adjustment down (and possibly right, don't recall but looks probable). What's interesting is the Raipd Fire sequences on the bottom 2 targets were much better. Possibly shooting them all in a lull in the wind?

2nd Volley: Again, top two taregts slow fire in 10 minutes. On both those left hand flyers it was definitely NOT me. It "could" have been wind but the gusts that day were super small, like maybe 2-3mph coming from our 4 o'clock which may account for it? Again, interesting the rapid fire shots on the bottom 2 targets were excellent.

So just for yuks on the thrid volley I threw in some SABP. I was thinking, lube is probably the same right? So I only did 5 sighters and made a slight scope correction for what I thought would work. What I got was a jam-o-matic. Almost every other round failed to extract. Not sure if it was Gen2 lube related or possible carbon ring build-up pressure from the Gen2 switchover, but never had THAT happen before in this rifle with SABP. On the bottom rapid fires I was trying to toss them in one-by-one and extract by running the bolt two or three times. Finally gave up on that last target as I could feel I wasn't lining them up properly by hand and was getting lead shavings in my results. BTW: ~3/4" groups @ 100Y out of SABP is about the norm that I usually see shooting our clubs NRL-style matches. And my SABP velocity is ~1,070fps on average, so the Gen2 stuff is definitely faster by about 30fps.





Hopefully I can get out and try it in my CZ457 (Whidden Lothar Walther barrel, Vanquish stock) but I still am having trouble with MPA's new side mag. release mechanism properly angling the rounds into the chamber without shaving the lead a bit. I may just feed them by hand very delicately into the chamber as I want to see results from another rifle since I still have 2 1/2 boxes of this Gen2 stuff remaining.

Holy crap that's cool. The headers look like they were a nightmare to fabricate.

Mike

Lawless said:

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Officer pacfire.

Bump

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MadDuner said:

Our Starlink system has been flawless - so far.

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Ours also for 2 years

Redlion said:

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2 or 3 years old but cool none the less.
Sure as shit wasn't time for the crew to evade or decoy!

Up

Took the RecoilX on my SiCo 36m in 5” config out yesterday. Shot on a 20” 260rem. I didn’t take it on and off for a true comparison but I feel like it made a pretty big difference. At 20x zoom I was able to watch impacts at 200 yards on steal. It kept the rifle that still. Overall I’m pretty happy with it.

Need to shoot some groups to see if the weight change affected the accuracy and needs tuned. I’m in the middle of new load development with new brass anyway.

Avail

DM1975 said:

I use Federal Automatch. I just tested out different ammo in my new CZ MTR last week and it actually was the best out of that rifle compared to Eley, SK, Wolf, and RWS. SD wasn’t the best but it grouped well out to 200 yards.

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DM1975 said:

Second group was Federal. The rest was Eley. I wasn’t even gonna try the federal, just had it to use to get an initial zero.
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This was at 50 yards? Something isn't right. What rifle are you shooting this out of? What headspace are you running?

Its been a while since I setup my rifle, so I'm going by memory; but Eley has a relatively thin case rim and my rifle does the best with Eley when the headsapce is at .038 or less, with the best being when I set headspace with a .037 headspace. I chose to setup my rig with a .039 headspace because that is appropriate for SK ammo, which is what I shoot the most of. It was a happy coincidence that this headspace also accommodates cheaper ammo, like Federal Auto Match.

I shoot a lot of Auto Match. Its cheap and it runs well in all of my semi autos. I've had results with the Fed that ranged from spectacular to meh. Performance varies greatly from lot to lot.

As far as the big SDs with Eley goes, my theory (and it's just a theory) is that when running eley with excessive headspace, it leads to inconsistent primer ignition which leads to the velocity variance. You can test this in your rig by paying attention to and trying to chamber rounds in a consistent manner.

For reference, I run a CZ 457 with a Lilja barrel. These barrels are spun up in a manner intended to allow the end user to set the headspace. If you have a similar setup, I would suggest getting at least one headspace gauge at say, .039 to at least give yourself a solid reference point from which you can experiment and take note of the difference headspace makes.

I also like to practice on ARA 50 yard targets. The ones where a score of 2500 would be a perfect score. With SK Semi Auto, which is a cheap ammunituon, relatively speaking, and my rifle setup to shoot it, I score 2350 or better 80% of the time with perfect scores happening often enough that it doesn't surprise me when it happens.

TheOE800 said:

This thread sucks.

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It came off the rails for sure

Dogtown said:

2915fps….so yeah, not quite 3000fps.

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Fortunately, you are still here 12 years later to answer his question .

There are a ton of websites to get parts from, Griffin isn't really offering all the pieces yet but probably will. Personally I would look into some type of delayed blow back, makes them alot easier to tune and much more enjoyable to shoot. I currently have a blowback 9mm and a mean arms bearing delay 9mm. The mean arms isn't the cheapest but you can use it on a standard ar lower with their Pmag inserts. You can also run their upper on a deticated 9mm lower if you want. I like the normal lower cause the mags are the same and indexing is the same action.

Bump.