Do magbfiers introduce parallax? I’d assume no.
I was zeroing and breaking in my new 16” barrel on my AR today. First box of PMC bronze 55gr turned in great results. Bushnell TRS-25 and generic 3x magnifier (yes mounted behind the red dot). My old 16” barrel was consistently 3.5MOA no matter what I feed it. This new barrel turned in 1.5-2MOA groups at 50yds for all 4 5 shot groups.
Next a box of federal LC M193. 5-8MOA at 100yds. 5 rounds of Hornady steel match the same. PPU 55gr .223 a little better at 50yds, but still printing about 4-5MOA.
I swapped BCGs between my upper, scrubbed out the barrel and finished off the box of 55gr PPU. 3-4MOA. Then a box of 69gr PPU HPBT and it was 3x5 shot groups of the same and then the final one turned in a nice clean 1.2MOA and then I had to pack it up for the day.
No fliers in these groups, there were all just spread out.
All were with the magnifier UNTIL the last 5 shot group when I took it off and turned in that best group of the day. A couple of times I noticed it was getting loose on the rail and once in the middle when I noticed it was getting loose it was also touching the red dot at that point, so I moved it back a space on the rail (so the last few groups with the magnifier it was spaced further back).
So that PMC was shot with the magnifier and were really good (IMHO and considering a 3 MOA red dot in use). That last group of the PPU 69gr was also fantastic and had no magnifier used at all.
Any thoughts? Next time I will leave the magnifier at home. Could a bad/loose/in contact with the red dot magnifier screw up my groups?
Could some of those just be barrel break-in? It was only about 60 rounds total shot through the rifle (did some shooting with my 20” also).
Windy as heck today, but not so bad it would screw up my groups this bad at these distances and I was mostly shooting when the breeze died down.
I was zeroing and breaking in my new 16” barrel on my AR today. First box of PMC bronze 55gr turned in great results. Bushnell TRS-25 and generic 3x magnifier (yes mounted behind the red dot). My old 16” barrel was consistently 3.5MOA no matter what I feed it. This new barrel turned in 1.5-2MOA groups at 50yds for all 4 5 shot groups.
Next a box of federal LC M193. 5-8MOA at 100yds. 5 rounds of Hornady steel match the same. PPU 55gr .223 a little better at 50yds, but still printing about 4-5MOA.
I swapped BCGs between my upper, scrubbed out the barrel and finished off the box of 55gr PPU. 3-4MOA. Then a box of 69gr PPU HPBT and it was 3x5 shot groups of the same and then the final one turned in a nice clean 1.2MOA and then I had to pack it up for the day.
No fliers in these groups, there were all just spread out.
All were with the magnifier UNTIL the last 5 shot group when I took it off and turned in that best group of the day. A couple of times I noticed it was getting loose on the rail and once in the middle when I noticed it was getting loose it was also touching the red dot at that point, so I moved it back a space on the rail (so the last few groups with the magnifier it was spaced further back).
So that PMC was shot with the magnifier and were really good (IMHO and considering a 3 MOA red dot in use). That last group of the PPU 69gr was also fantastic and had no magnifier used at all.
Any thoughts? Next time I will leave the magnifier at home. Could a bad/loose/in contact with the red dot magnifier screw up my groups?
Could some of those just be barrel break-in? It was only about 60 rounds total shot through the rifle (did some shooting with my 20” also).
Windy as heck today, but not so bad it would screw up my groups this bad at these distances and I was mostly shooting when the breeze died down.