Group Size: 50 yards verses 100 yards

cz452shooter

cz452shooter

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This topic has puzzled me for some odd reason (and its probbaly about the simpelest question out there :D). Usually when I am shooting on a day with absolutely no wind, and where I can usually rule conditions out of the equation (and for the most part human error), I will be shooting at 50 yards and my groups will usually be in the 1/4" range but yet when I go to 100 yards my groups will open up to 3/4" inches for 5 shots or so.

Now, a rifle that will shoot 1/2 inch groups at 100 yards, from my experiences will not be able to group 1 inch at 100 yards.

Now theoretically, is this supposed to happen...? If a rilfe groups 1/4" at 50 yards and you rule all conditions/human error out of the equation will it shoot 1/2" groups at 100 yards?? From my experiences absolutely not but what have you guys found?

Maybe its just me.. maybe not. You would think that if the ammo can shoot .25 groups it would open up to just twice the size at 100.

Maybe it could be just this simple...: When you shoot a subsonic round, say Lapua superclub for example it has dropped very little at 50 yards, maybe an inch or two and at 100 yards it has dropped maybe 8.5 inches. Maybe this group size happens because say at 25 yards or so it really starts to drop off, and the further it gets the more dramatic the drop... And a 20fps variance in normal FPS would only cause it to drop say 1/2" at 50 but maybe 1 1/2" or more at 100?

This would also be why the .17 shoots good at 50 and 100, about half the size at 50.

I am more just talking out loud here :D... What have you guys found for group size hundred verses 50 yards??? :confused:
 
All bullets leave a given barrel at exactly the same point. As soon as they clear the barrel they begin to "wobble" as they find their find their center of rotation axis. Once they stablize, they "go to sleep". The distance at which the wobbling ends and they go to sleep varies with each rifle due to twist, each load due to velocity, and each bullet due to bullet composition.
 
I'd say the 1x/3x - 50/100 yard group is pretty consistant with what I've seen in standard velocity 22 ammo, especially if you cheat and omit flyers.

Any kind of wind and 100 yard groups go to hell.

My Finnfire with a Lilja "EPS" barrel, using EP$ ammo will basically one hole at 50 but about .6 is best I can do at 100.
 
bisonhd said:
I'd say the 1x/3x - 50/100 yard group is pretty consistant with what I've seen in standard velocity 22 ammo, especially if you cheat and omit flyers.

Any kind of wind and 100 yard groups go to hell.

My Finnfire with a Lilja "EPS" barrel, using EP$ ammo will basically one hole at 50 but about .6 is best I can do at 100.
Click to expand...

I have thought about putting a Lilja on a finnfire before (but the trigger on the finfire was what stopped me from doing that).

Do you ever shoot at the Victoria benchrest matches at 100 yards? I am hoping to come down to one of them one of these days....

Eley Match EPS works like a hot d@mn in my Winchester 52D ;)
 
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cz452shooter said:
I have thought about putting a Lilja on a finnfire before (but the trigger on the finfire was what stopped me from doing that).

Do you ever shoot at the Victoria benchrest matches at 100 yards? I am hoping to come down to one of them one of these days....

Eley Match EPS works like a hot d@mn in my Winchester 52D ;)
Click to expand...


I agree, finnfire's have just an 'OK' trigger, there is still a few Jewel's available but unfortunately they are state side.

Saanich may have BR matches but no where else does down here. I do plan to hit the one in Parksville one of these days.

Any 22 rifle that can consistantly cut sub minute 5 rd. groups 22 at 100 is pretty good I think. My rifle certainly won't do it with everything. Fortunately I don't have to shoot EPS all the time, ($) I just wanted to see what it would do.
 
bisonhd said:
I agree, finnfire's have just an 'OK' trigger, there is still a few Jewel's available but unfortunately they are state side.

Saanich may have BR matches but no where else does down here. I do plan to hit the one in Parksville one of these days.

Any 22 rifle that can consistantly cut sub minute 5 rd. groups 22 at 100 is pretty good I think. My rifle certainly won't do it with everything. Fortunately I don't have to shoot EPS all the time, ($) I just wanted to see what it would do.
Click to expand...

Like you said, and sub MOA gun at 100 yards is doing good. My most accurate gun will only do it with the good ammo... :(.

I sent you a PM....
 
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