Getting beyond 75Yd

[Mykrolian]

I'm a practiced shooter with an Anshutz 1907, and I regularly hold 1/8 inch groups at 25 yards, 1/4 in groups at 50 yards, and roughly 3/8 in to 75 yard. It's at 100yards that my groups get yucky. I can't wrap my head about what's happening, but adding those additional 25 yards gets me patterns outside of 1 in. I'm using Midus-X Ammo. Does anyone have any ideas about what's happening

 

[Dusty Stevens]

Are you using wind flags and know what theyre telling you? Have you tried other ammo and is this a lot tested ammo youre using or just off the shelf?

 

[jbell]

Agree with Dusty, a particular ammo that shoots at one yard line may not at another. For best results (especially at 100 yards and beyond) test ammo from scratch.

 

[1813benny]

Some thoughts:
1. 22LR ammunition group sizes do not grow at a linear rate. It is not uncommon - even with tested ammunition - to have groups more than double between 50 and 100 yards.

2. As noted by Dusty, are you using wind flags? What were the conditions? Were you also watching the mirage?

3. Are you shooting sling, bench, F-SBR?

4. Proper parallex adjustment in scopes becomes even more important as distance increases.

 

[jepp2]

Does anyone have any ideas about what's happening

I can only share my experience with my Annie 1411. At 50 yards groups are mostly in the low 0.3's. I shot it one time at 100m. I ran out of vertical adjustment on my scope but dealt with that. Groups were about 6 inches. Conditions weren't the issue.

 

[Mykrolian]

Thanks fellows. I'm shooting with a bipod at an indoor range. My positioning is stable with my left arm resting on a bench and my left hand seated against the butt hook, driving it into my shoulder. I use a very light grip on the trigger hand. Almost pinching the trigger.
This gives fine results at 75 yards, but the spread is all over at 100. I thought that if I suffered from poor positioning, it would show at all ranges, and I suspected that if I had an ammo problem, it would manifest in the elevation. As of yet, I have not attempted different cartridges.

 

[1813benny]

Something does not sound right...from 3/8" at 75 yards to over 1" at 100 yds? All distances, including 100 yards were shot on an indoor range?

Indoor ranges are known to have their own unique conditions due to ventilation and mirage from lights.

 

[kzin]

Yeah something more has to be changing than just the 25 yard increase itself.

How are other shooters at the same range doing?

 

[Mykrolian]

LoL, I haven't met any at that range that can hold a 1" group from 100 yards. But, you have a point. It is bizarre that the group changes so much from 75 to 100. Perhaps I'll try another lane as they've always put me in the same stall.

 

[buckeye68]

Put wind flags out at 25, 50, 75 and 100 yards and I bet the wind flag at 100 yards will be the opposite as the other 3. The exhaust fans at a indoor range will be the strongest near the back stop.

 

[dgeesaman]

My selected / lot tested Center X ammo shot very well at 50y and worse than average at 100y. This was in a tunnel. Doesn't matter because I shoot at 50y.

If you want to shoot best at 100y, you'll need to use ammo selected specifically for its 100y accuracy in your gun.

 

[Outrider27]

Agree with jbell and dgeesaman; when going to 100 yards, you need to do ammo testing all over again, as ammo that works at shorter ranges (even 75 yards) may not be the best for 100. Been there, and ended up with an ammo that wasn't the best at 25 to 75 yards for 100 yard work, where it proved to be superior.

 

[dstoenner]

the rule of thumb is that a group grows or shrinks by a factor of 3. So a group of .350 at 50 yards would be 1.050 at 100 yards. Or conversely at 1.5 inch group at 100 yards would be .5 at 50

These are averages. That means that a group can fall in a range of +/- 2SD. That can make the min max pretty big that one group by itself won’t really give you the picture.

David

 

[USMCDOC]

i like groups like this at 100

 

[thebeav]

i like groups like this at 100

Me too !
What gun and ammo, if you don't mind me asking......?

 

[USMCDOC]

Me too !
What gun and ammo, if you don't mind me asking......?

Anschutz 1613 in a No Am Anschutz BR stock, still has the factory barrel on it, with a Uptagrafft tuner tube, factory trigger. Not bedded, just sitting in the wood at 35 inch pounds. Ammo was Midas Plus

 

[grauhanen]

When rifle and shooter are removed from the equation, the ammo is one of two key parts. The other is that air movement between shooter and target must be accounted for or there is near-complete calm, something which is difficult to achieve at distances like 100 yards.

Conistent results can be difficult to obtain, especially on a range where when winds occur they are fast changing. Furthermore, completely windless conditions are not always consistently windless.

Below are ten consecutive 10-shot groups at 100 yards. The ammo was a good lot of Midas +, the rifle a 1973 vintage Anschutz 1411 barreled action in a factory Anschutz BR 50 stock, no tuner. The targets were shot for group size, with the ten group average at just under 0.800 inches. (The outside dimensions of the dark black ring are are shown.)

Clearly, there was some unaccounted air movement or the ammo was not always equal. Add the rifle and shooter to the equation and the results are imperfect.

 

[lawman29]

My Remington 40xb liked Midas at 50 yds, but at 100 yds RWS R100...

 

[rwh]

My guess would be paralax

 

[Mykrolian]

Changed lanes and was somewhat better. Shot a couple of 3/4" groups.