Why is the AI AXMC shooting this bad.
- Thread starter wolfy
- Start date
How would we know, you’ve told us absolutely nothing about your setup?
Need way more info man.
Make sure your barrel is shouldered properly. Check torque on your quickloc screw.
Check ring/scope mount torque.
What optic are you using? Ammo?
What does barrel refitted mean? just removed and reinstalled?
Make sure your barrel is shouldered properly. Check torque on your quickloc screw.
Check ring/scope mount torque.
What optic are you using? Ammo?
What does barrel refitted mean? just removed and reinstalled?
The bullet is still asleep, duh.
It’ll wake up at 100y/ m
These 140 hybrids still out here like
We will need to know caliber, what ammo you are using, whose barrel, have you torqued it properly, etc.
Ok sorry guys I should know better.
It is an AI axmc 338 lapua magnum.
It has a atacr 7 7-32 ×56.
It is on a nightforce one piece unimount. 4 screw rings so that is 8 all up.
The first shots the scope did move so that got tightened to spec 24inch Lds.
The scope mount on to rifle tightened to 68 inch Lds as spec.
We used hornady match 250 grain, used 300grain fiocchi.
I will be going to a private property hopefully this weekend to test with the gunshop(accuracy international dealer).
The shots that are in the picture are Winchester ballistic tip.
The barrel on the axmc you just tighten by hand and then 49 inch Lds the one screw for the barrel.
So I took the barrel off and cleaned the contacts and refitted.
It is an AI axmc 338 lapua magnum.
It has a atacr 7 7-32 ×56.
It is on a nightforce one piece unimount. 4 screw rings so that is 8 all up.
The first shots the scope did move so that got tightened to spec 24inch Lds.
The scope mount on to rifle tightened to 68 inch Lds as spec.
We used hornady match 250 grain, used 300grain fiocchi.
I will be going to a private property hopefully this weekend to test with the gunshop(accuracy international dealer).
The shots that are in the picture are Winchester ballistic tip.
The barrel on the axmc you just tighten by hand and then 49 inch Lds the one screw for the barrel.
So I took the barrel off and cleaned the contacts and refitted.
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Judging by the amount of weight your lifting I suspect you may have physical issues shooting 338LM.
Did you make sure everything between the action and scope was seated properly before tightening?
For that rifle to shoot any ammo that bad and assuming the barrel is on correct as is the NF scope and your not shooting offhand the first thing that pops in my mind would be a problem with a muzzle device. Do you have anything on the muzzle and if so remove it and try again.
Some other variables:
Are YOU generally a capable and 'accurate' shooter?
How many rounds does the barrel have through it?
How long has it been since it was last fired? Is the bore in good condition?
Is the muzzle brake on correctly? (not moving).
Are you shooting off a support? bipod / bag / rest / sled etc.
How windy was it?
What is the extreme spread in velocity for the ammunition you're shooting?
Are YOU generally a capable and 'accurate' shooter?
How many rounds does the barrel have through it?
How long has it been since it was last fired? Is the bore in good condition?
Is the muzzle brake on correctly? (not moving).
Are you shooting off a support? bipod / bag / rest / sled etc.
How windy was it?
What is the extreme spread in velocity for the ammunition you're shooting?
Yep. Marked and seated good. No issue there. Will change scope and mount over with other scope just incase something wrong on scope side.
No wind though.
This is the setup.
I think I can shoot well. I shoot a 300 win mag and do clays at 512 meters. That is my load. So I can hold a rifle steady.
The bipod is loaded well. I do clamp a wood beam on the bench and load the bipod.
The rifle is new. 60 rounds through it now.
Just for kicks, don't load your bipod next time you shoot and compare it. That shouldn't affect the rifle, but then again, an AI shouldn't shoot that way. The interesting thing is that the rifle isn't shooting generally horrible groups, as in a wide but equal dispersion of rounds radially from the center of the group in all directions, but is obviously vertically stringing, so something is interfering with the rifle system. If it was a bad barrel it would shoot differently than that.
Yep I thought that was my breathing. I do believe I did not load the bipod on those shots. ( no wood to get good load).
The bipod is an AI bipod. So the feet can roll. Thay will not jump like the Harris can.
I think I should get more testing done.
Maybe no bipod and see.?
I want to thank all of you for suggestions.
did you remove/reinstall the action rail to ensure it wasn't moving? Also, you mentioned you removed the barrel, when you reinstalled it did you torque the quick change screw down to the right 49 in/lb?
I think the rifle may just be pissed at you, probably feels offended shooting only at 50m. 
Hi,
I hate to be the one to say it first but....from reading your replies about bipod can do this and bipod can do that....
Have you let someone else shoot the rifle?
From your replies it is pretty clear that your fundamentals are lacking and that 338LMM is EXPOSING every single piece of them.
Bipods do NOT hop...no matter whom the manufacturer is, no matter what rifle/cartridge combination is....period...they just do not!!
UNLESS you are not driving the rifle properly and with a 338LM....IF you do not drive it right it will definitely drive you and the target will show it.
Sincerely,
Theis
I hate to be the one to say it first but....from reading your replies about bipod can do this and bipod can do that....
Have you let someone else shoot the rifle?
From your replies it is pretty clear that your fundamentals are lacking and that 338LMM is EXPOSING every single piece of them.
Bipods do NOT hop...no matter whom the manufacturer is, no matter what rifle/cartridge combination is....period...they just do not!!
UNLESS you are not driving the rifle properly and with a 338LM....IF you do not drive it right it will definitely drive you and the target will show it.
Sincerely,
Theis
I vote for shooter issue being the problem. I'd interpret the target photos as being essentially 2 MOA groups, which is probably better than typical for a shooter new to precision work on a 338. If my hunch that the OP is new to the game is correct, I'd suggest investing in a 308 bolt, a 6.5 barrel, and a two fundamentals classes about 6 months apart.
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It's a new rifle, so where is the factory muzzle brake? Neither of my factory AXMC 338s came with a brake like that - have they changed them?
Can you see any baffle strikes on the brake?
I won't jump on the "shooter's issue" bandwagon quite yet. IF he's experienced and proficient with his 300WM as he says, the step up to a AXMC 338 isn't that much. As heavy as they are, they're pretty tame to shoot (but they still DEMAND proper fundamentals and will exploit every weakness). But if he's even just a sub-1 MOA shooter with his 300WM, he shouldn't be shooting THAT poorly with just the step up to 338 on a stable, heavy AXMC. Staying on the rifle through recoil and watching what the reticle does should answer the question for him. If it's all over the place, or he can't tell what happens, then that is the shooter (or a really bad barrel, or a baffle strike, etc, etc). If the reticle stays in view and doesn't jump wildly off POA, then it's something else. Definitely have a shooter known to be proficient with big magnums give it a try too though.
Can you see any baffle strikes on the brake?
I won't jump on the "shooter's issue" bandwagon quite yet. IF he's experienced and proficient with his 300WM as he says, the step up to a AXMC 338 isn't that much. As heavy as they are, they're pretty tame to shoot (but they still DEMAND proper fundamentals and will exploit every weakness). But if he's even just a sub-1 MOA shooter with his 300WM, he shouldn't be shooting THAT poorly with just the step up to 338 on a stable, heavy AXMC. Staying on the rifle through recoil and watching what the reticle does should answer the question for him. If it's all over the place, or he can't tell what happens, then that is the shooter (or a really bad barrel, or a baffle strike, etc, etc). If the reticle stays in view and doesn't jump wildly off POA, then it's something else. Definitely have a shooter known to be proficient with big magnums give it a try too though.
He's from Australia - that IS a factory muzzle brake. The factory suppressor screws onto the exposed threads at the front of the brake.
While I was away from the computer I figured that must be the case (not in US) because he left clues I didn't pick up on - namely everything noted in metric measurements. Got back on and I checked his profile - duh. We get a much different brake on the ones here. Thanks.
We always like to place blame on the equipment before anything else, but most problems originate from the shooter behind the rifle. Equipment these days is damn good, especially AI. We never like to think that the problem revolves us, the shooter, but most commonly it is. Our hubris gets in the way at times.
The bigger the cartridge, the more your lack of fundamentals get exposed and exploited. .338LM is not near as forgiving to shoot as smaller short action cartridges.
I'm constantly reminded of this myself. When I shoot my ~21lb braked 6BRA, I think I'm a fucking stud. Then I pull out an unbraked .308 and I'm humbled awfully quickly. I'm not as good of a shooter as my 6BRA wants me to think I am.
The bigger the cartridge, the more your lack of fundamentals get exposed and exploited. .338LM is not near as forgiving to shoot as smaller short action cartridges.
I'm constantly reminded of this myself. When I shoot my ~21lb braked 6BRA, I think I'm a fucking stud. Then I pull out an unbraked .308 and I'm humbled awfully quickly. I'm not as good of a shooter as my 6BRA wants me to think I am.
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Accuracy International 30 cal / 338 TACTICAL MUZZLE BRAKE (FOR AI SUPPRESSOR #5620) needs #0920 scre
Accuracy International 30 cal / 338 TACTICAL MUZZLE BRAKE (FOR AI SUPPRESSOR #5620) needs #0920 scre 5240
www.scopelist.com
I’ve noticed a massive difference in tolerable recoil in a light TRG42 just swapping from a mild 250gr load to a hot 285gr load.
Shooting an unknown 300wm (which may be loaded with 168gr at an average velocity for all we know) versus a 338LM would be night and day.
Shooting an unknown 300wm (which may be loaded with 168gr at an average velocity for all we know) versus a 338LM would be night and day.
Yes I have the fixit torque special 49 inch pound for this.
The action is a bonded unit. It all looked ok.
But will get that checked. Good point.
I think they might be on the path that it could have build corrosion in the barrel.
I have heard of a case like that but it was an old rifle and steel. But this is a new rifle.
Yep the action is bonded, but I meant to check this part to make sure it’s torqued down. It has a built in recoil lug so not likely the issue but something to check.
Attachments
You torque the AI Axmc that much or is it a different rifle?
To tell the truth it seems some one did something wrong before I got it. Unless it is the scope.
So first thing first change scope over and test.
Actually test again because refitted barrel.
Then change scope with mount.
Shoot of a bag.
Then check if barrel can be changed over for test. I am sure they will have another 338 lap barrel.
Then ammo. Ammo last.
After that warranty.
Yep had a look at that. That looked level. Will take another look. Thanks.
It is not moving for sure.
I was have the same issue when I first got my AI PSR I found that 49 in pounds was not enough so I got a 6nm(53.1 in pounds) preset T handle torque wrench and my groups settled right in. I also use it for the AI-AT. This is with hand loads. I shot some Hornady 285 factory but the box of 20 i had could never get it to group under 1 moa at best. I am shooting Berger 300 hybrids with N570 and it groups 1/2 moa or slightly better on a good day.
The fact that you're ignoring my questions tells me all I need to know
You suck and are blaming the rifle.
