Could A2 flash suppressor cause wild innacura y?

[Falstaff]

I put an old a2 fh on my Savage mkii fv-sr, could that cause point Of impact to jump around? I was shooting at 100 yards and after thinking I had the scope sighted in, poi would jump 4 to 6 inCHES every 2-3 shots. I was using 2 or three different bulk ammo (federal,Remington subsonic, old remmy viper, win. Wildcat, and even cci stingers) all ammo would not group better than 5 inches @100
How can you tell if a scope is defective? The scope is a brand new BSA sweet 22. Nothing rattling around in it and the mounts are tight.

[pdq_wizzard]

I put an old a2 fh on my Savage mkii fv-sr, could that cause point Of impact to jump around? I was shooting at 100 yards and after thinking I had the scope sighted in, poi would jump 4 to 6 inCHES every 2-3 shots. I was using 2 or three different bulk ammo (federal,Remington subsonic, old remmy viper, win. Wildcat, and even cci stingers) all ammo would not group better than 5 inches @100
How can you tell if a scope is defective? The scope is a brand new BSA sweet 22. Nothing rattling around in it and the mounts are tight.

I want to know also

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[roushstage2]

I don't see why it would. Some .22s come with flash hiders on them and shoot just fine. What were shooting conditions like? 100 yards with .22LR and any amount of wind can move the shot a fair amount.

[G-forceJunkie]

Bulk ammo sucks for repeatable accuracy. What distance is the paralax set in that scope? How good of a shooter are you? There and many variables you need to take into account. If you suspect the flash hider, simply remove it and retest.

[Izzy43]

I put an old a2 fh on my Savage mkii fv-sr, could that cause point Of impact to jump around? I was shooting at 100 yards and after thinking I had the scope sighted in, poi would jump 4 to 6 inCHES every 2-3 shots. I was using 2 or three different bulk ammo (federal,Remington subsonic, old remmy viper, win. Wildcat, and even cci stingers) all ammo would not group better than 5 inches @100
How can you tell if a scope is defective? The scope is a brand new BSA sweet 22. Nothing rattling around in it and the mounts are tight.

Did the rifle come with the flash suppressor? If it did not, how did the rifle shoot before it was installed? Simple solution to determine if that's the issue is to remove it then see how it shoots.

Use and stick with one ammo while you are pursuing this problem. The ammo that you are using will not yield great accuracy at 100yds anyway. I would suggest you get some CCI Standard Velocity ammo for shooting that distance, usually Turners has it.

Bad scopes don't necessarily rattle around. Remove and re-mount the scope. Just because the mounts are tight doesn't mean its mounted properly. Remove the scope from the rings, remount the rings and just snug the bolts to the rifle if you don't have a torque wrench, if you do 25 in/lbs on the ring mounting bolts is the norm for most.

Mount the scope in the rings and don't torque the #@$% out of the bolts, again just snug them down. Just because the scope is new doesn't mean its good.

Move back to 25 or 50 yds and see what the groups are. Shoot for groups not precision type shooting at a bullseye target.

[Merc1138]

I put an old a2 fh on my Savage mkii fv-sr, could that cause point Of impact to jump around? I was shooting at 100 yards and after thinking I had the scope sighted in, poi would jump 4 to 6 inCHES every 2-3 shots. I was using 2 or three different bulk ammo (federal,Remington subsonic, old remmy viper, win. Wildcat, and even cci stingers) all ammo would not group better than 5 inches @100
How can you tell if a scope is defective? The scope is a brand new BSA sweet 22. Nothing rattling around in it and the mounts are tight.

Take the FH off and see if the results are the same.

As far as the scope is concerned, do you know what you torqued the rings down to(did you use a torque wrench and follow the instructions that the things should have come with)? Do you know for certain the bases for the rings are secure?

Did you have some other means of aiming the rifle before this scope?

[sneather]

I would ABSOLUTELY say that it could.

I have a mini-14 that is laser-beam accurate. Just insane, even with the stock iron sights. However, years ago I decided to be stupid and mount a flash suppressor to the thing. From that point on, I couldn't hit the broad side of a barn. No exaggeration. I have no idea what physics or thermal dynamics led to the issue. But when I pulled the bastard off and threw it in the trash. The gun was back to total accurate supremacy.

[pennys dad]

Did you sight in before putting on the FH?
Where you benchresting or standing or?
Was subsonic better then the others or did it make a difference?
How did the FH get installed?

I put an old a2 fh on my Savage mkii fv-sr, could that cause point Of impact to jump around? I was shooting at 100 yards and after thinking I had the scope sighted in, poi would jump 4 to 6 inCHES every 2-3 shots. I was using 2 or three different bulk ammo (federal,Remington subsonic, old remmy viper, win. Wildcat, and even cci stingers) all ammo would not group better than 5 inches @100
How can you tell if a scope is defective? The scope is a brand new BSA sweet 22. Nothing rattling around in it and the mounts are tight.

[Falstaff]

Ok lessee here; the rifle came with thread protector not a fh. I didn't have a suitable wrench so I didn't try it without. ( it was on pretty tight) The wind was very light and the parallax was set at 100 yards ( the sweet 22 has parallax adj on the front objective lens). I was shooting it from the bench on a rest, I even bagged the rear for many shots, still wouldn't group. I've shot some verysmall groups with my 93r 17 with same trigger and similar scope ( sweet 17) so I am confident that operator error has been excluded as a variable...
I could actually see most of the bulk ammo and of course the subsonic rounds flying down range which I've never really noticed before in 30 years of shooting .22s ( and not like at a 600 yard high power match where you see the vapor trail of the bullet, I could actually see the bullet traverse the arc from me to the target.
The fh was installed with no washer but it indexed just right. Since there's no provision for open sights on the fv-sr I guess I'll have to slap another scope on it.
I've never used a torque wrench when installing scopes so it's possible I over torqued it but I didn't massively over torque it.

[sarge1572]

it almost sounds like the muzzle was damaged when the flash suppressor was installed. Even a LITTLE damage to the crown of the muzzle will affect the rounds.... wildly.