Scope Zero Check Thread

Pulled rail and scope, took the 7stw barrel off, smith turned a new 7prc barrel and test fired it, pulled it and put the 7stw barrel back on, put the rail and scope back on. Double checked 200 zero then shot one at 600 and one at 800 in pretty good wind.

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Crimson Trace 4-16 FFP
March 15
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March 28
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Today (4/20) after a 30-40 miles of dirt roads, a couple hikes, and a few dozen shots. I forgot the scope was dialed 0.2 mil right (for another load).
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Pulled rail and scope, took the 7stw barrel off, smith turned a new 7prc barrel and test fired it, pulled it and put the 7stw barrel back on, put the rail and scope back on. Double checked 200 zero then shot one at 600 and one at 800 in pretty good wind.

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From the looks of the yardage markers, the shooters at your range are comfortable out to 600 but can't hit chit at 800 :ROFLMAO: :ROFLMAO: :ROFLMAO:
 
39* and raining today. Zero check before doing some offhand practice. Hornady American Gunner, Im down to my last couple hundred rounds. (Frowny face). Little lower than normal. Did not adjust.
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Finished with a 10round group of Hornady Match 140gr. Third time its been like this, this stuff just doesnt group in this gun. (Very frowny face)
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F!!!!

I'm not sure if I have a zero shift or if it's me sucking. I have in the past had issues with vertical changes in zero due to my sucking.
...
Update: checked zero prone in controlled conditions the following weekend and was definitely 0.1mil high on previous trip. I have in the past noticed that I tend to shoot 0.1mil higher when prone than from a bench. I need to figure out why.
Have you checked for parallax in both positions?
 
Not sure many people can. hold within 0.1 mil.

I'm positive I can't.
In the context of this discussion ( zeroing) I think my above comment isn't relative

Someone should have called me on it.

C'mon guys, I'm no hot-house flower.
 
Zero check after the season, hiking, riding around in the truck & in a pelican case, and pulling it apart to reinstall factory trigger spring.

Tikka T3 6.5 PRC
20” w/ Hyperion K
147 ELD-M
SWFA 5-20 Sportsmatch High rings
Paint pen on everything
 

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RSS 6.5 CM, haven’t touched the zero since initial zeroing last June.

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RSS .223, same story.

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The “You Suck At Shooting” sticker remains firmly planted on my rifle case.

Focused a bit on cheek weld and position behind the rifle. Less crosswind on this day, more straight behind. Not much abuse on the rifles between shooting sessions, just some dirt road rides.

Adjusted the 6.5 right .2 MIL (previous session said 0.1 MIL right) and made some solid first shot impacts on steel and rocks between 390 and 455. Backed up to 530 at a different angle and the 5-15mph gusty wind got tricky to call. Definitely changing direction along the trajectory. Good training conditions, learned a lot.

Obviously, the .223 was more affected by the wind. Had a tougher time with impacts with it. Previous zeroing was with Norma GTM 77gr SMK's. This one was with Black Hills 77gr TMK's.

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Zero check on my .308 with 10 rounds today. I did have the suppressor off this rifle and on another for a bit. I put it back on prior to this zero check. No other changes to the rifle in the interim. The rifle has ridden for miles of pasture and washboard roads in my side by side. I can’t really account for the .1 mil left shift except for possibly wind. I did make a .1 mil right adjustment after this group.

John

 
Zero check on my .308 with 10 rounds today. I did have the suppressor off this rifle and on another for a bit. I put it back on prior to this zero check. No other changes to the rifle in the interim. The rifle has ridden for miles of pasture and washboard roads in my side by side. I can’t really account for the .1 mil left shift except for possibly wind. I did make a .1 mil right adjustment after this group.

John


What is your setup ?
 
Rifle: .223 Remington Model 7 action bedded in Manners EH8, Mullerworks 1:8" 18" 2B fluted, actions screws 50 inlb
Scope: March F 3-24x42
Rings: The much maligned Talley Ultralight, caps & base screws all torqued to 20inlb

March 5 zero set back to a handload after using factory ammo for work
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March 8 zero confirm
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Today May 2 zero check
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Rifle has driven a couple thousand KM and shot 5 deer & a pig in that 2 month period. No issues. I have never had a zero shift with this combo of more than 0.1MRAD in 6 years.
 
First time this rig has exhibited a POI shift in about 4000 rounds. Not unhappy with the grouping but it’s about a half mil low. It’s a T3x stainless 18” 223 in a Stocky’s VG Hunter stock with a SWFA 6x in Sportsmatch rings and an AB Raptor 8-stack. The group is 10-rounds of Black Hills TMK under an inch. Also shot AAC 77gr TMK (~2”) and AAC 77gr OTM (~2.5”). All three had the same general POI. Historically the black hills ammo always had about a half inch higher POI than the AAC loads.
 

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Round 2. Zero check after the season, hiking, riding around in the truck & in a pelican case, and pulling it apart to reinstall factory trigger spring.

Tikka T3x .223
18” w/ Hyperion K
Black hills 77gr TMK
SWFA 6x w/ Sportsmatch T084
Paint pen on everything

(2nd group is the 75 gr AAC Sabre Black tip)
 

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IMG_3853.jpegIMG_3849.jpegGetting a load figured out for this Kimber MT 7 WSM. Finally got my ADG brass all formed up. 8lbs 7 OZ with the polonium 30 can. I need to bump this charge .3-.5 to tighten up some vertical but it’s promising. Shot off a pack with a rear bag.
 
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