CZ SP-01 shooting low...and its not me, I swear!

[bsumoba]

So a few of us went shooting and we shot a FN-9, SP-01, Kimber 1911 Full Size, and a 686 SSR...what a fun day by the way.

Here are the results as far as accuracy to the target goes:

* FN-9 - 3rd place
* Kimber 1911 - 1st place
* 686 SSR - 2nd place
* SP-01 - last place

So as far as precision, SP-01 was probably 2nd behind the Kimber.

So, for all of you people who don't know accuracy vs. precision.
* Precision is how the shots are grouped relative to other shots in the group
* Accuracy is how the shots are grouped relative to the target

Consistently amongst all of us, and most of us are good shots... shot the SP-01 low. The other handguns were shooting where we thought they should be shooting so to us, it seem like more the gun than the shooter.

The SP-01 was shooting a 7 yards, about 2-3 inches low. This seems kind of low to me IMO. I have the stock SP-01 night sights on them (3 dot battle sights). I am thinking of swapping out the rear to a competition style and then using a 5.5mm or 6mm FO front sight (most of the competition rear sights say to use 6.5mm front sights). This will get my POI at 7 yards maybe 1-2 inches below, then 10 yards maybe POI/POA, and so on and so forth.

What's your opinion?
* suck it up and leave them on and compensate on my POA to hit my target?
* do the swap at a $100+ dollar hit to the wallet?

[zfields]

Just curious, but what ammo.

[bsumoba]

Just curious, but what ammo.

actually...that could be the problem!

we were shooting reloads and they were 115gr FMJs.

[Freq18Hz]

actually...that could be the problem!

we were shooting reloads and they were 115gr FMJs.

LOL...yeahhhhhhhhh.


#1 thing that effects accuracy besides lack of coffee, is low testosterone, followed by ****ty ammo.

Go get some premium ammo and put your gun in a ransom rest to see how "accurate" it is. Then, get a cup of coffee, a steak, and shoot it off hand to see how "accurate" you are.










If you can hit the heel of that boot with reloads, you are doin' alright.


-Freq

[tbc]

That was very odd.

My SP-01 with Tru Dot night sights was spot on in accuracy using reloads 115 gr (Not in precision though. Hehehe)

I used Image #2


And here are the results from 8 yards




Sent from iPhone

[zfields]

actually...that could be the problem!

we were shooting reloads and they were 115gr FMJs.

Could be, they are factory sighted with S&B, which is loaded a bit warm.


I run my reloads a bit above minimum, but haven't noticed a big difference, but this is in USPSA, so I probably wouldn't notice it


When you are shooting 115 reloads, who knows though. I avoid 115 just because I know they were loading them just to be cheap as possible.

[tbc]

I guess there are different kinds of reloads.


Sent from iPhone

[BrassCase]

Maybe just a little more powder...

[CAGLS]

That was very odd.

My SP-01 with Tru Dot night sights was spot on in accuracy using reloads 115 gr (Not in precision though. Hehehe)

I used Image #2


And here are the results from 8 yards




Sent from iPhone

Funny I use the combat sight picture#3 and get the same results.

[Speedpower]

I've been shooting reloads (9mm 115gr) on my SP01 from day one and it was dead on using stock front and rear sight, (replacing the front sight to FO with the same height 5.5mm later on)
OP are you shooting it bench rest?

[zfields]

I've been shooting reloads (9mm 115gr) on my SP01 from day one and it was dead on using stock front and rear sight, (replacing the front sight to FO with the same height 5.5mm later on)
OP are you shooting it bench rest?

Charge weight matters

Sent from my HTC Droid Incredible 2 using Tapatalk 2

[omnitravis]

I also use image 3, I still need some practice though, heh. I definitely prefer my CZ to the Beretta and Sig though.

[bsumoba]

So just a little more info for you to digest and I will post some pics with factory ammo and +p ammo as well, but the reloads I am using are LAX reloads I bought from the gun show pre-panic. I cant remember if we loaded the same ammo on the FN-9 but something tells me we did and it was shooting fine with sight picture 3 at 7-8 yards.

[bsumoba]

I've been shooting reloads (9mm 115gr) on my SP01 from day one and it was dead on using stock front and rear sight, (replacing the front sight to FO with the same height 5.5mm later on)
OP are you shooting it bench rest?

I will shoot some from rest, but we were shooting from a standing position.

[IVC]

As you pointed out, it's accuracy vs. precision.

With bad reloads what you expect to see suffer is precision, not accuracy. Due to variation of powder load, bullet depth, case resizing, etc., individual impact points will be spread out in a *random* pattern around your POA (point of aim). At 8 yards it's almost impossible to have a systematic ballistic effect (bullet drop) of several inches due to bullet weight and/or powder charge - it would pretty much have to be a squib before you see that much of a drop at such a short distance.

So, here is the test. Shoot a whole magazine by using exactly the same POA and not adjusting during the string. At the end of it, the spread of holes will give you the measure of precision (how consistent you, your ammo and your gun are; in that particular order), while the position of the center of the group will give you the measure of accuracy (how to adjust your sight picture and/or your sights, as well as how to compensate for bullet drop if you were shooting a rifle).

Finally, there is a possibility of systematic error that would affect your accuracy while *not* affecting your precision, e.g., consistent flinch or consistent incorrect trigger pull. To eliminate these effects you might want to shoot from the rest or let someone else try it.