Sighting in a 9mm PCC

DoubleTapDiabetus

DoubleTapDiabetus

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I just picked up a bore sighter and I was wondering what would be the best distance to sight in an 9mm with a red dot and 3x magnifier. I would be using mainly 115g brass and I have approx 50m to play with at home without going outside and scaring the neighbours.
Also, any tips for doing it in the evenings (kids in bed) would be a bonus.
 
You can use a boresighter with a ballistic program they will get you on paper pretty good but without some actual tweaking with real ammo you will generally not get a bullseye call it good setup from a boresight.

For distance I zero mine like my 22lr for 50 yards, You only need 8 yards to really get it to work in the ballistic program set zero range to 50 and target range to 8 and I can boresight in my basement without scaring the neighbors with my scary guns works the best for right left alignment up down is what you need the ballistic program for but basically you put the sight on the center of the target and the boresight laser will hit like 2" low or whatever the program tells you it needs to be. Make sure to measure and input your hight over bore value that will make a big change to the distance below center the laser needs to line up

It works but still needs fine tuning when you shoot but saves a ton of ammo at the start
 
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I get mine on paper at 10 yards then move to 25. The gun I use for IDPA is sighted in at 10 yards only because we have head box shots into a 3" circle at that distance. With the Optic you have to be concerned with height over bore. My other PCC's I sight them in at 25 yards and group almost POA at 50 yards. Free style I just don't notice any difference grouping into an 3" circle.

It all depends on what you intend to do with your carbine. I would think grouping inside of an inch at 100 yards is beyond the capability of most and likely the cartridge. The bullets have the aero dynamics of a pointed brick so if someone can shoot, even off a bench into 1" with the 9MM I in awe.

To the OP I think you will find your best accuracy using 125 gr bullets. From my experience the 1 - 10 twist favours the 124/125 gr bullets both in lead and jacketed. Others my have different experiences.

Take Care

Bob
 
For IPSC, 25m would be a good zero range. Alpha is tall enough even if the distance is a bit farther out. My pre turd PCC was zeroed at 25 and I never had any problems with engaging targets. If you’re just planning on a plinker, 50m may be a good idea but if it were me I’d like an LPO on it at 50 and on.
 
There is no rhyme or reason to what I have done so keep that in mind. I zeroed both of my Ruger PCs at 100m. They both have a crappy TRS-25 on them. Despite a 100m zero I went to show my wife the offset at 10m an ended up just chewing the bullseye out of the target. I'm either lucky or something isn't right.
 
DoubleTapDiabetus said:
Well I had it on one of the oic banned so I moved it over to something I can shoot. Yes it's overkill but it's something fun for friends to try the same platform as the banned ones and sway a few more red voters blue.
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My apologies. Didn't mean to say that. I shot my friend's Ruger PC Carbine STANDING the other day, and couldn't shoot well even at 25 yards - that thing is HEAVY! Hence the foolish comment.
 
B said:
There is no rhyme or reason to what I have done so keep that in mind. I zeroed both of my Ruger PCs at 100m. They both have a crappy TRS-25 on them. Despite a 100m zero I went to show my wife the offset at 10m an ended up just chewing the bullseye out of the target. I'm either lucky or something isn't right.
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Nice deal. That is a pretty good setup then.
 
I tried zeroing at 25M, bushnell TRS-25.

I bought a pic rail that mounts to the barrel in place of the rear peep sight, ran out of windage to the left. I tried the red dot on the receiver and almost ran out of windage to the left. Groups around 2" to 3".

I am using steel case 115 grain ammo and a Harris style bipod.

Should I expect better?
 
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rmsg0040 said:
I tried zeroing at 25M, bushnell TRS-25.

I bought a pic rail that mounts to the barrel in place of the rear peep sight, ran out of windage to the left. I tried the red dot on the receiver and almost ran out of windage to the left. Groups around 2" to 3".

I am using steel case 115 grain ammo and a Harris style bipod.

Should I expect better?
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I don't often shoot for groups but 2-3" (@100m..?) is pretty good especially considering the limitations of your optic. Which steel cased ammo are you using? The Barnaul seemed to run well out of mine and velocity was decent at 1400fps or so.

I have never expected stellar accuracy out of PCCs. If I can reliably hit my hostage popper at 100m I'm happy.
 
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rmsg0040 said:
I tried zeroing at 25M, bushnell TRS-25.

I bought a pic rail that mounts to the barrel in place of the rear peep sight, ran out of windage to the left. I tried the red dot on the receiver and almost ran out of windage to the left. Groups around 2" to 3".

I am using steel case 115 grain ammo and a Harris style bipod.

Should I expect better?
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At 25m ? If it was my pcc id expect groups under 1"

 
At 25 yards my Ruger and another not to be named will shoot all touching using my 1.5X x 5X Leupold knock off.

I would love to see a 10 shot group inside of 3" with a red dot at 100 yards using a 9MM PCC, Not saying it can't be done with a 3MOA red dot just that I would like to see one posted. Even a 5 shot group.

The IPSC target favours a 25 yard sight in for sure because of the depth you have in the Alpha zone. With IDPA you can be faced with the 10 yard 3" down zero in the head box. If the shot is required a miss costs you 5 seconds of time which is a stage killer. So you just have to make the shot. I have missed the same shot closer in due to the height over bore issue. You have to aim just over the target to make the close in shots on the head box.

Take Care

Bob
 
B said:
There is no rhyme or reason to what I have done so keep that in mind. I zeroed both of my Ruger PCs at 100m. They both have a crappy TRS-25 on them. Despite a 100m zero I went to show my wife the offset at 10m an ended up just chewing the bullseye out of the target. I'm either lucky or something isn't right.
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The bullets have to come up through the line of sight, apex, and drop to impact the line of sight at 100m.
 
B said:
There is no rhyme or reason to what I have done so keep that in mind. I zeroed both of my Ruger PCs at 100m. They both have a crappy TRS-25 on them. Despite a 100m zero I went to show my wife the offset at 10m an ended up just chewing the bullseye out of the target. I'm either lucky or something isn't right.
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There is always two zeros on a gun because all bullets travel in a rainbow pattern. You will have a close zero and the far zero with a ballistic program you can find them both on the drop table of the program
 
Ravage said:
There is always two zeros on a gun because all bullets travel in a rainbow pattern. You will have a close zero and the far zero with a ballistic program you can find them both on the drop table of the program
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I was commenting on the fact it seems to have worked out perfectly that both point blank and 100m are the same with my gun/ammo.
 
B said:
I was commenting on the fact it seems to have worked out perfectly that both point blank and 100m are the same with my gun/ammo.
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Actually not really. I have Hornady's "Handbook of Cartridge Reloading Vol. 2. At 1,100 fps with a 100 yard zero using a 125 gr FP bullet the POI at the muzzle is -.8" + the height of your sight over the bore. At 10 yards the POI bullet will be virtually the same as it would be at 100 yards. A good understanding of ballistics can aid you in determining the best combination of sighting in for the application you are using the gun for.

Even in IPSC/IDPA PCC Divisions the knowledge can be useful and can result in quick automatic responses to target distances, albeit we do have the benefit of generous ideal target impact zones.

Once the whole PCC OIC situation returns to normal (Conservative win) I would like to take on Mr. Gopher with one of my 9MM Carbines.

Take Care

Bob
 
Canuck44 said:
Actually not really. I have Hornady's "Handbook of Cartridge Reloading Vol. 2. At 1,100 fps with a 100 yard zero using a 125 gr FP bullet the POI at the muzzle is -.8" + the height of your sight over the bore. At 10 yards the POI bullet will be virtually the same as it would be at 100 yards. A good understanding of ballistics can aid you in determining the best combination of sighting in for the application you are using the gun for.
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Well unfortunately for me it doesn't seem to work out the same with my other PCCs. Hornady has an interactive ballistic calculator on their website, plenty of apps available these days as well. Thanks for the the lesson though...
 
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