Just installed a Romeo 1 Pro on my P320 X-Compact and will be going to the range next week to zero it. This is my EDC so I would like to know if you choose to zero at 7 10 or 15 yards. Thanks.
Obviously caliber and load makes a big difference. With a 9mm 124 grain +P Gold Dot zeroed at 25 yards will be pretty flat to 40 yards or so them the poi will start to drop. You don't get 2 zeros like you do with most rifles. A 25 yard zero is 3/16" low at 15 yards.I am curious, between 15 &25 yard zeros, at what further distance will you also be zeroed at?
Soli Deo Gloria
That's the same argument for a 100 yard zero on an AR. It's kind of a religious debate. Some prefer that, some prefer the 50/200, some prefer the 300-whatever.I read an interesting article recently that advocated zeroing the RDS on any weapon (pistol or rifle) at the distance that equals the peak of its flight trajectory. For a 9mm pistol that equates roughly to 10-15 yards according to some ballistic trajectory charts I've been looking at online. The rationale for using that point was that it reduces all shooting corrections for other distances, closer or farther, to adjusting your POA above your desired POI. Using any other range would require you to sometimes aim higher and sometimes lower compounding the shooting solution.
That gives me something to think about this morning.That's the same argument for a 100 yard zero on an AR. It's kind of a religious debate. Some prefer that, some prefer the 50/200, some prefer the 300-whatever.
I prefer a 50-200ish zero on ARs, basically out to around 220 or so, depending on bullet and velocity, you are never more off than your height over bore (over or under).
The only time I do it different is if I'm using a BDC optic that requires a specific zero.
Back to pistols, you absolutely can do the same thing.
Go to JBM - Calculations - Trajectory (Simplified)
Select your bullet, velocity, height over bore, and any other options you want.
Set the range increment to one yard and set the maximum to something reasonable.
Check the checkbox for maximum point blank zero.
Execute.
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These photos explain it all. Shooting Illustrated: Best Distance to Zero a Pistol-Mounted Red Dot25 yards. The sight is as much as an inch above the bore. So....doing some quick, non precise math in my head, if you zero at 25 yards your point of impact is going to be 3/4" low at 5 yards. If you zero at 5 yards your point of impact will be 5 inches high at 25 yards. I'd prefer to be off a fraction of an inch off at 5 yards than be several inches off at any realistic difference.
Yeah, that's fun alright. I used to do that too, but they ran me off the golf course and told me to never come back.I shot a lot at 7 yards and still do sometimes but I have started liking shooting reactive targets which move away from you when shot and seeing how far out you can still hit one consistently. I shoot golf balls a lot and can hit them from 10 to 25 or so yards with a reflex sight on a pistol pretty consistently. Golf balls might not be the safest target but they are fun and easy to shoot rapidly and easy to see. I am pretty sure I am zeroed at 7 yards but the adjustment at 25 or so isn't far off it seems.
You should have done it out of your planeYeah, that's fun alright. I used to do that too, but they ran me off the golf course and told me to never come back.
hahaha!Yeah, that's fun alright. I used to do that too, but they ran me off the golf course and told me to never come back.
Those two pictures say more than any written article. Case closed, for me anyway.Great paper with target results to back up the facts. Thank you Dkayak.
To keep this simple, lets only pertain to 9mm. The reason most use a 25yd zero is because that's where the round crosses down through its zero plane. Bullet elevation at 0yds (bullet leaving the barrel) and 25yds is identical. This makes for a very reliable and consistent zero distance. From roughly 0yds-10yds the round is climbing, it then flattens out and started to drop. Past 25yds 9mm will continue to drop and you will need to know your holdovers in order to accurately hit targets at greater distances (roughly 1ft at 100yds). Basically, your poi inside 25yds will be high (1/4-1/2in) and your poi past 25yds will be low.I am curious, between 15 &25 yard zeros, at what further distance will you also be zeroed at?
Soli Deo Gloria