The Beretta CX4 Thread

Great looking set up! Do you find the scope to be a little low to get a consistently fast sight picture?

I actually do.. I plan on putting the spacer in once I get back home from work. This is my first carbine type gun and only my 4th firearm, so I'm just going by trial and error here. First optic I have ever installed and first red dot I have ever used. It's awkward getting lined up as it is so low.
 
both for me. I got it on paper at 25m, then zeroed it again at 50. Irons are set at 25 and the red dot is set for 50. doesn't group like a nice rifle, that's for sure, but its ok. clays are easy at 50m. I can hit shotgun shells at 50m with it most of the time.
 
Mine is sighted in at 50.

My grip and barrel shroud came in, also added the riser to the Sparc2. It's much better now. Now I just need SierraPapa's trigger etc.

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Gentlemen, I give you La contessa Luigina, bella e letale signorina:

Prior to having her makeup done:
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After prettying herself for the ball:
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Now to see if she can dance... :redface:
 
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What type and weight of bullets are guys using? I never used to care about 9mm accuracy because I always used it in pistols but now I'm curious.
 
I'm planning to use mostly 115gr ammo for the slight speed increase over 124gr. Not really interested in the 147gr ammo. That's for target and plinking. For shooting zombie wabbits from hell, I'll keep a mag of soft point or hollow point 124gr at hand.

Keep in mind though, at the ranges I'm considering (<100m), bullet weight may be pretty much irrelevant, I suspect. Terminal energy is almost identical, all you get is a very slightly flatter trajectory and a tiny microscopic wee bit less sensitivity to crosswinds. The differences may be smaller than what I'll get just from inconsistent shooting stances, for example. :p

I plan on trying as many brands and weight of FMJ/TMJ as I can lay my greedy paws on and see if anything gives problems. Including bulk Norinco or Barnaul stuff if I can find any. And I'd like to try some 9x19 NATO for kicks and giggles. My only hesitation with that is a caution in the Cx4 manual to the effect that using +P ammo may reduce the life-cycle of small parts in the firearm. And I'm not sure about using steel or aluminum cased ammo... need to research before I try those.
 
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I just picked up a NR CX4 in 9mm today. Which mag holds 14 rounds for this again? Now I need an optic. With the current price of .17HMR ammo this will be my new gopher gitter.
 
Cx4 Range report

I said I'd report on the performance of La Contessa Luigina once I had 1000+ rounds through it, and well, I'm a little late, but here it is. I just had so much fun with it, to the tune of 1590 rounds in 5 weeks!

First thing to know: beautifully reliable. I've had two spent casings that jammed in the ejection window after their extraction, and that's it. I've used 10 kinds of commercial 9mm ammunition in 105, 115 and 124gr, with brass or aluminum cases and La Contessa ate them all without a hitch. No duds, no half-feeds, no stovepipes, everything went flawlessly.

Second thing to know: the trigger is horribly stiff. It's a two-stage, where you'll squeeze with no resistance for a bit, then encounter the WALL of resistance. I don't have the tool to easily measure it, but comparing with other rifles I've shot during this period, I'd estimate that the Cx4 trigger is at 10 pounds or more. You get used to it, but it's a challenge to keep the sights on target while squeezing that hard.

Accuracy? Using a cheap NCStar bipod, I regularly attained 4-5 MOA. I thought I could do better, but the question that bugged me was "how much is the rifle, how much is the ammo and how much is my fault?". So this weekend I set out to answer that niggling thing.

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I obtained a shooting rest (cheap Remington model, the damned tightening screw stripped itself off after half an hour of use), eight different models of commercial ammo and set myself to shoot 20 rounds (2 mags) of each ammo type in its own target. Then I'd ignore the outermost two holes and measure the 18-holes group for size. All shooting was done with the forestock on the rest and a sand bag for the stock, at 50 yards, using 4x magnification on the scope.

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Results:

WinchesterWhite Box115gr FMJ7.2 MOA
CCIBlazer Aluminum115gr FMJ6.4 MOA
CCI Blazer Brass115gr FMJ8.0 MOA
Geco124gr FMJ4.8 MOA
FederalAmerican Eagle115gr FMJ6.6 MOA
FederalAmerican Eagle124gr FMJ5.4 MOA
RemingtonUMC115gr MC6.6 MOA
RemingtonUMC124gr MC8.2 MOA


A note: I actually tested the CCI Blazer Aluminum twice, because the first grouping size was 9.0 MOA which did not match my previous experience with this ammo. 8.0 MOA on CCI Blazer Brass does, however, reflect my previous (not very happy) experience with that ammo.

That Swiss Geco ammunition impressed me sufficiently to decide to test it further. I took the carbine off that broken rest, re-installed my cheap NCSoft bipod and shot without a sandbag under the stock. I shot 6 x 5 rounds on visicolor 5-inches target, and this is the result:

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I shot the groups left to right (top row are groups 2-4-6) Groups 1 and 5 are nothing to write home about. Group 2 is about 1.75", group 3 is 2.00", group 4 is 1.5" and group 6 an even inch wide... meaning I finally shot a 2 MOA group with a 9mm pistol cartridge! w:h:


So what's the conclusions for all that?

1. Highly addictive hobby. The zen of the shot is fun as hell and I may soon need therapy (not that I didn't know this after 30+ years in the army, mind you... :rolleyes:) In fact, gotta slow down: this is not a sustainable ammo expenditure rate unless you're a doctor, a lawyer or have a corporate budget for that sort of things. And no, I'm not into reloading 9mm.

2. Budget-priced ammo is generally pretty much similar in accuracy. At pistol ranges (10-25 yards), only a professional (or truly hard-bitten enthusiast) would notice a difference. I can expect a 4-5 MOA group at 50 yards if I apply myself. But the CCI Blazer Brass 115gr and Remington UMC 124gr seem to be a little below the others in performance, still. I'll avoid them from now on.

4. The Swiss Geco ammo seems consistently performing very well. I'm going to buy more and confirm that empirically. Then I'll try to find some match-grade FMJ and see what I can do with it.

5. The Cx4 may like 124gr ammo more than 115gr... It's a 19 3/4" barrel with a 1 in 10" twist. I think I need more testing on this one. And with 147gr ammo, too. Much mooooooore testing..... yess.....


VIVA LA CONTESSA! :runaway:
 
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