POI shift

J

jaybic

Guest
Hello,

I am just wondering if with sporter weight rifles(or any type for that matter) if any of you guys notice a significant shift in point of impact when you sight in off a front rest and a bag(protektor rabbit ear type) and then shoot the same rifle off a bipod and the same rear bag all else being equal...ei..wind..conditions...ect..ect?

I zeroed my rifle(off the bag and front rest) at 200 yards and it shot quite well, for what it is. I then stopped by the range to recheck my zero about 3 wks later before a 10 day hunting trip and it wasnt even on a 5 inch circle target at the same distance. Can there really be that much difference or are some rifles more consistant between bag/rest and bag/bipod?

Thanks,

jaybic
 
Yes & yes

Even Benchrest rifles with a wide flat fore-end might show a slight POI difference relative to where the forend rests on the front bags.......many shooters use a rest stop on the front rest to ensure the rifle returns to the same position for each shot. I can see where their may be a disparity ( ~2.5 " @ 100 yds)switching to a bi-pod.
BTW you did monitor the conditions during your shots, right?
 
My rest is not a fancy one but does have a fore end stop so I can return to battery as best i can and I do try to make sure the sling swivels are not riding on the bag.

I dont have wind flags but I did have two surveyor tape ribbons out on wires at 50 and 100 yards but there was next to nothing for wind on both occasions and its in a valley which helps. Its just hard to believe that the same rifle with the same batch of loads loaded at the same time will put 3 shots under a dime one day and then wont even touch paper the next time off the bipod. Shots just went all over. I shot my match grade Ar and my trued and worked over 700 in .308 off the same bipod same day and they shot the same POI as normal but this rifle(6.5lb sporter weight) was all over.

A rifle shoots .075-1.00 one time and the next time is 5 inch groups and nowhere near where it was sighted in prior? Im lost here. Only difference was the day and the bipod.

Jaybic
 
If it helps you any I've never been able to shoot worth shucks off of a bipod. I see others use them with no problem and I've tried several different techniques but they just don't work for me.
 
Start eliminating the variables

......shoot at closer ranges, using both set-ups.
What type of rifle? make?, stock type?
Barrel contour? Fast shot string? Slow?
 
jaybic said:
Hello,

I am just wondering if with sporter weight rifles(or any type for that matter) if any of you guys notice a significant shift in point of impact when you sight in off a front rest and a bag(protektor rabbit ear type) and then shoot the same rifle off a bipod and the same rear bag all else being equal...ei..wind..conditions...ect..ect?

I zeroed my rifle(off the bag and front rest) at 200 yards and it shot quite well, for what it is. I then stopped by the range to recheck my zero about 3 wks later before a 10 day hunting trip and it wasnt even on a 5 inch circle target at the same distance. Can there really be that much difference or are some rifles more consistant between bag/rest and bag/bipod?

Thanks,

jaybic
Click to expand...

There could be a lot of difference if the rifle isn't bedded properly. You mentioned that it was a sporter rifle. Has it been glass bedded? Free floated?
 
Its a factory Abolt Micro hunter in 22-250. 20 inch pencil barrel(floated but maybe it touches when it gets hot?). Trigger tuned down by a good local gunsmith to 2-2 1/2 lbs and Leupold glass. I shoot 3 shot groups to keep heat from being a factor.

Can these rifles be tuned up to shoot with the Rem 700/Savage rifles? I am thinking of having it pillar bedded and if that dont help, putting on a new tube. If that dont work, I am using it for a pry bar.:(

I have already ordered a new Savage 16 to replace it but other than the fact that its unreliable as hell, I really like the rifle.

Thanks for your time and effort in helping,

Jaybic
 
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