S&W Response 9mm zero-in

WI357SIG · Dec 4, 2023

Mounted EOTECH XPS2-O Holographic Sight on my new S&W 9mm Response Rifle. We were shooting off a table with the fore-end resting on a shooting bag. At 25 yards it was shooting 1-1/2” high with excellent group size. Rather than mess with the zero, moved back to 50 yards. It then shot 8” high and we ran out of daylight.
Research shows Fiocchi 115 Gr FMJ is -0.9” at 25 yds and -3.8” at 50 yds.
Was thinking zero at 50 yds on next session and then move forward. My son has a lead sled so should probably add that to the mix. Any suggestions.
I like the rifle and it is a great 9mm plinker. The trigger is another matter. The trigger gauge registers 8 lbs. pull. Sent a query to S&W about customizing with after market trigger. Waiting to hear.

mig1nc · Dec 4, 2023

I usually zero 9mm at 25yards.

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Tom S. · Dec 4, 2023

With just a cursory glance, the trigger appeared to be the standard AR type trigger, which if true would mean any springs or replacement parts may work.

IAM Rand · Dec 5, 2023

Interested to see how the lead sled works. My FPC has a tighter group at 25. I think 50 is kinda the "Sweet Spot." I have put a scope on my FPC and took it to 100. It opens up a little from what you got at 25.

115 goes high and 147 goes low. Try out some different ammo to see if the groups inprove.

Yendor357 · Dec 9, 2023

If the center of your sight is 2.5 inches above the bore, as is my Colt AR-15, 9MM; and you’re impacting 1.5 inches high at 25 yards, then in theory, you should be approximately 4 inches high at 50.

I can’t explain the additional 4 inches.

rwsmith · Dec 10, 2023

Here are a couple of trajectory charst...

...from a ballistic calculator I use:

The one on the left is sighted at 50 yards:

115 gr FMJ, Ball. Coef. .127, 1300 fps out of a 16" barrel, zero at 50 yards, 100 yard range.

The one on the right is sighted at 25 yards:

115 gr FMJ, Ball. Coef. .127, 1300 fps out of a 16" barrel, zero at 25 yards, 100 yard range.

It's kind of groovy that both sight ins are good at both distances with that loading.

PS: The sight height I used was 1.5"

PPS: I added a chart with a velocity of 1500 out of a 16" barrel as per Cor-Bon Test.

LVSteve · Dec 11, 2023

Hot 124gr ammo with a 70 yard zero gives you a trajectory ± 0.75" from the sight line from 10 yards to 80 yards. I prefer that plan.

Bald1 · Dec 11, 2023

My old Ruger PC9 is zeroed about 1 1/2” high at 50. It’s pretty much the same at 25 and couple in low at 100. I can 9” ring steel plates from point blank to 125 with ease. That’s with any cheap 115gr FMJ

WI357SIG · Dec 18, 2023

Photo of my S&W Response with newly installed flash hider. Also installed Rise RAVE PCC trigger 3.5 Lb single stage. Nice improvement.
Also a couple targets from yesterday, aligns with what is spelled out above. EOTECH 1X is max @50 yards for my vision.
Thanks for helpful information.

CBStuard · Dec 24, 2023

rwsmith can you try 15-20 yd zero please? I sight my 5.56 at 50 yds and that keeps me within 2 inches high or low 0 to 225 yds. I like that. So thinking, w/ the 9mm try a 15-20yd zero which would maybe run it 1-2" high at 30-40 but keep it closer at 100 vs the 5" drop.

jeffrefrig · Dec 25, 2023

I've heard of some early '50s custom vehicles with shaved door handles, etc. referred to as lead sleds; what is that in shooting terms?
Oh yeah; Merry Christmas!

mig1nc · Dec 25, 2023

jeffrefrig said:
I've heard of some early '50s custom vehicles with shaved door handles, etc. referred to as lead sleds; what is that in shooting terms?
Oh yeah; Merry Christmas!

It’s a device that you affix your rifle to for accuracy testing.

The idea is that you take the shooter out of the equation when testing accuracy.

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S&W Response 9mm zero-in

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