I am after a bit of help analysing my grouping if you wouldn't mind commenting please.
The rifle is a SAKO TRG 22 in .308WIN, only a couple hundred rounds old.
I use HBC BJD Dyer 155gr projectiles, Federal brass (POWER SHOK) and Federal 210M primers and 45.0 gr ADI AR2208 at around 2780ft/s.
It is the 26" barrel and scoped with a Nightforce NXS 8-32x56.
I shoot F-Class Standard.
I went to the range Saturday morning about 7am, confirmed my 50m windage zero in very stil conditions and shot some groups at 300m and 600m. There was less than 10 seconds between shots, chambered from the mag keeping my cheekweld consistent.
The shots were from a stable (Caldwell ROCK) front bag / tripod and rear hand squeeze bunny ear rear bag all on a shooting mat. The front bag leather gets caught up in the under forend accessory rail grooves and it is tapered down. I sit the rear point of the butt in the rear bag ears.
I am certain there was "no" wind, that is, I couln't feel any on my face and the leaves were sitting still.
I adjusted parallax so the crosshair hardly moved when moving my cheek on the stock and the picture was full and in line with the scope (no black movement on the edges).
The shots felt good (despite being attacked by ants).
The vertical element is not too bad suggesting the ammunition and vertical control isn't too bad.
However the horizontal control is a bit ordinary as seen by the shot strings.
300m
The first shot (coldbore yet fouled) was point of aim point of impact and same point of aim thereafter for subsequent shots. The figures are vernier lengths in inches.
600m
This shows exceptional vertical control and ammunition performance for the top 3 (and even other two) shots.
The horizontal issue is my concern - especially 'no wind' (less than 1 mile per hour from 1.30 pm if anything). The group is about 6 inches wide.
I was by myself and haven't been criticsized / coached on my technique but I think that may be part of the issue. If you want to see / think a pic of my position will help let me know and I'll put it up. I generally stay very behind the rifle and quite low.
Shooting the match (900m) later that afternoon and going back to the clubrooms I asked some advice from the other shooters.
One guy said I need to get a flat and wide under forend that is parallel to the bore and that will help prevent the frontend fouling on the bag. Also apparently I need to get the rear bag in the flat part of the under-butt.
Another guy said it was proabably wind. I ran Exbal with Kestrel data and even 1 mile/hr only pushes the proj 3.5 inches. That's still far off my 6 inch group.
I need to do some more dry fire at a vertical line and see what's going on.
Any ideas?
Thanks in advance.
Greg
Below is a link of a SAKO TRG if you are not familiar with them and will make my description easier to understand.
http://www.sako.fi/sakotrgmodels.php?trg22
The rifle is a SAKO TRG 22 in .308WIN, only a couple hundred rounds old.
I use HBC BJD Dyer 155gr projectiles, Federal brass (POWER SHOK) and Federal 210M primers and 45.0 gr ADI AR2208 at around 2780ft/s.
It is the 26" barrel and scoped with a Nightforce NXS 8-32x56.
I shoot F-Class Standard.
I went to the range Saturday morning about 7am, confirmed my 50m windage zero in very stil conditions and shot some groups at 300m and 600m. There was less than 10 seconds between shots, chambered from the mag keeping my cheekweld consistent.
The shots were from a stable (Caldwell ROCK) front bag / tripod and rear hand squeeze bunny ear rear bag all on a shooting mat. The front bag leather gets caught up in the under forend accessory rail grooves and it is tapered down. I sit the rear point of the butt in the rear bag ears.
I am certain there was "no" wind, that is, I couln't feel any on my face and the leaves were sitting still.
I adjusted parallax so the crosshair hardly moved when moving my cheek on the stock and the picture was full and in line with the scope (no black movement on the edges).
The shots felt good (despite being attacked by ants).
The vertical element is not too bad suggesting the ammunition and vertical control isn't too bad.
However the horizontal control is a bit ordinary as seen by the shot strings.
300m
The first shot (coldbore yet fouled) was point of aim point of impact and same point of aim thereafter for subsequent shots. The figures are vernier lengths in inches.
600m
This shows exceptional vertical control and ammunition performance for the top 3 (and even other two) shots.
The horizontal issue is my concern - especially 'no wind' (less than 1 mile per hour from 1.30 pm if anything). The group is about 6 inches wide.
I was by myself and haven't been criticsized / coached on my technique but I think that may be part of the issue. If you want to see / think a pic of my position will help let me know and I'll put it up. I generally stay very behind the rifle and quite low.
Shooting the match (900m) later that afternoon and going back to the clubrooms I asked some advice from the other shooters.
One guy said I need to get a flat and wide under forend that is parallel to the bore and that will help prevent the frontend fouling on the bag. Also apparently I need to get the rear bag in the flat part of the under-butt.
Another guy said it was proabably wind. I ran Exbal with Kestrel data and even 1 mile/hr only pushes the proj 3.5 inches. That's still far off my 6 inch group.
I need to do some more dry fire at a vertical line and see what's going on.
Any ideas?
Thanks in advance.
Greg
Below is a link of a SAKO TRG if you are not familiar with them and will make my description easier to understand.
http://www.sako.fi/sakotrgmodels.php?trg22
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