POI shift ?

[JimNM]

MOA and MRAD (aka:MIL) have ZERO to do with accuracy. Accuracy is in the ballistics.

MOA and MRAD are measures of resolution. An accurate gun with a crappy scope is still an accurate gun. A crappy gun with a great scope is still a crappy gun. The two variables do not correlate.

Sorry to drag the topic away from the OP. I will go quietly back to my corner.

 

[CoyoteGod]

It also depends on what scope you have. In example a 1/4 MOA scope might not show a POI change at 100 yards as much as what a 1/10th MOA scope would.

This is a very common misconception that MIL is more accurate than MOA and it simply isn’t. MOA in the clock face is a smaller unit of measurement over distance, even though MIL has more clicks. MIL is used and adopted by the military and competition because it’s the most used worldwide, that is the best benefit, over than mathematically MIL is often easier for dial rotation calculations for long distance in your head.

 

[CoyoteGod]

MOA and MRAD (aka:MIL) have ZERO to do with accuracy. Accuracy is in the ballistics.

MOA and MRAD are measures of resolution. An accurate gun with a crappy scope is still an accurate gun. A crappy gun with a great scope is still a crappy gun. The two variables do not correlate.

Sorry to drag the topic away from the OP. I will go quietly back to my corner.

Seriously. This has been beatin lmao! Back to POI!

 

[Vetmx]

When you have guns on one side of the safe that never experience it, some for 7+ years, and guns on the other side that do, that kinda rules out excuses blaming everything except your favorite toy. Especially when you’re using the same optics. When you physically fix the issue and understand what caused it, there’s no need to debate it. Fixing a pellet POI shifter can be different than fixing a slug POI shifter. Different factors to consider.

 

[Vetmx]

MOA and MRAD (aka:MIL) have ZERO to do with accuracy. Accuracy is in the ballistics.

MOA and MRAD are measures of resolution. An accurate gun with a crappy scope is still an accurate gun. A crappy gun with a great scope is still a crappy gun. The two variables do not correlate.

Sorry to drag the topic away from the OP. I will go quietly back to my corner.

This is funny and true. I’m currently dealing with a crappy shooter. After tons of testing and then some machining, still crap. So I tossed a $2k optic on just to be sure. If it wound up being the scope, it would give me an excuse to beat myself up for a week. Nope, still a crappy shooter.

 

[Gerry52]

The most I've ever had poi shift is MAYBE a click or two but most times NONE. My FX Boss, Royale 500 & Bobcat .22 are amazing that way. I traded my Bobcat for an Edgun r3 long, .22 & it doesn't seem to suffer poi shift either! Is it LUCK or the platforms I choose?

 

[ocdairgunner]

I experienced POI shift from both of my PCP’s. Do keep in mind that I shoot from my room where temperature is rather consistent (within 68-72F). Outside temperature however is always changing and so is wind speed and direction. The target I zero my PCP’s is 45 yards from my room window. Every time I have had a POI shift, it has been horizontal, thus making me turn the scope adjustment knobs 3-5 clicks to get back to zero. Could it be my scope? Most likely, but I think wind plays a part too. At 45 yards - 2-5 mph breeze can cause drift. Sometimes I get frustrated because it’s hard to tell if it’s me, the gun or scope, projectile (slugs in Taipan and pellets in the FX) or other factors. I have just accepted it and chalk it up to the quirks of this hobby.

I would really like to have access to an indoor range where I can test both my PCP’s. Taking away the wind and temperature as variables. This way I could test zero at 50,75 and 100 yards on a day to day basis and see of its the gun, scope, or me.

 

[ThE PuNiShEr]

I experienced POI shift from both of my PCP’s. Do keep in mind that I shoot from my room where temperature is rather consistent (within 68-72F). Outside temperature however is always changing and so is wind speed and direction. The target I zero my PCP’s is 45 yards from my room window. Every time I have had a POI shift, it has been horizontal, thus making me turn the scope adjustment knobs 3-5 clicks to get back to zero. Could it be my scope? Most likely, but I think wind plays a part too. At 45 yards - 2-5 mph breeze can cause drift. Sometimes I get frustrated because it’s hard to tell if it’s me, the gun or scope, projectile (slugs in Taipan and pellets in the FX) or other factors. I have just accepted it and chalk it up to the quirks of this hobby.

I would really like to have access to an indoor range where I can test both my PCP’s. Taking away the wind and temperature as variables. This way I could test zero at 50,75 and 100 yards on a day to day basis and see of its the gun, scope, or me.

Hi mate, here's something I think I can help with. The fact that the outside temperature is different from that of the room you're shooting from and the rifle is tempered to it, does not affect the velocity, for those 45 yards to the target, the projectile cannot be affected by this temperature difference. Play with the wind completely and check the speed of the shots again. I think it's unnecessary to fill your head with nonsense like barrel indexing and so on Today, my hobby friends and I spent 3-4 hours shooting 250-300 shots at a distance of 100 m in the Extreme Benchrest discipline. I would say that I am satisfied with the day, I again scored 210+ points for a non-professional like me

 

[ocdairgunner]

Hi mate, here's something I think I can help with. The fact that the outside temperature is different from that of the room you're shooting from and the rifle is tempered to it, does not affect the velocity, for those 45 yards to the target, the projectile cannot be affected by this temperature difference. Play with the wind completely and check the speed of the shots again. I think it's unnecessary to fill your head with nonsense like barrel indexing and so on Today, my hobby friends and I spent 3-4 hours shooting 250-300 shots at a distance of 100 m in the Extreme Benchrest discipline. I would say that I am satisfied with the day, I again scored 210+ points for a non-professional like me View attachment 572462View attachment 572463View attachment 572461

Thanks friend. I will keep that in mind the next time I set-up my targets. I have tested my first shot velocity from both by PCP's and I am very lucky to have them tuned really well. The Taipan shoots the H&N 25 grain slugs at 940fps and the FX Wildcat shoots the 44.75 grain JSB's at 895 fps. Through my various tests, the first shot after the guns have sat overnight or for multiple days have been within 5 fps of their average. My issues I believe is from my trigger pull and wind causing the POI shift. I will have to be mindful next time I shoot and perhaps use a gun rest to shoot so it takes out the trigger pull issue/variance from the equation.

 

[jjwoody03]

Ive had a classic FX rifle for several years and the first thing I noticed was the barrel, which is basically free floated from the breech was not very rigid and I was always checking the zero every time I took it out of the cabinet. Once I installed a barrel band to increase the stiffness of the barrel the re-zeroing problem went away...