Here is what I have so far. I use a labradar.
Before I had the upper sent in:
4-23-18, St. Cloud Mn, 68 degrees
2314.26 avg 3 shots, Federal Fusion commercial 120 grain
2230.14 avg 4 shots, 8208, 27.3 gr, Hornady 123 SST, CCI primers
2254.38 avg 5 shots, 8208, 27.6 gr, Hornady 123 SST
2267.29 avg 5 shots, 8208, 27.9 gr, Hornady 123 SST
2292.07 avg 4 shots, 8208, 28.2 gr, Hornady 123 SST
2323.30 avg 5 shots, 8208, 28.5 gr, Hornady 123 SST
Bad grouping all shots
4-26-18, St. Cloud mn, 55 degrees
2212.08 avg 5 shots, 8208, 27.3 gr, Hornady 123 ELD-M CCI primers
2248.45 avg 5 shots, 8208, 27.6 gr, Hornady 123 ELD-M
2269.86 avg 5 shots, 8208, 27.9 gr, Hornady 123 ELD-M
2292.36 avg 3 shots, 8208, 28.2 gr, Hornady 123 ELD-M
2312.85 avg 5 shots, 8208, 28.5 gr, Hornady 123 ELD-M
Bad grouping all shots. Sent upper back for inspection while I had my back surgery.
7-16-18, St. Cloud Mn, 80 degrees
2270.00 avg 8 shots, Alexander Arms Nosler 120 gr BT
2101.32 avg 5 shots, 8208, 26.6 gr, Nosler 120 Spitzer
2132.88 avg 5 shots, 8208, 26.9 gr, Nosler 120 Spitzer
2172.36 avg 5 shots, 8208, 27.2 gr, Nosler 120 Spitzer
2205.63 avg 5 shots, 8208, 27.5 gr, Nosler 120 Spitzer
Grouped fairly well. Sulzar firearms took it apart to inspect. Said nothing wrong. Still think they did something. The SST and ELD-M shot horrible previously. Just did a batch of both to try again, hopefully next week. Will let you know how it goes. I did order and installed a 3 lb timney trigger after my last range trip. Went back out to the range with the AA 120 gr nosler for a function test. Grouped allot better.
Before I had the upper sent in:
4-23-18, St. Cloud Mn, 68 degrees
2314.26 avg 3 shots, Federal Fusion commercial 120 grain
2230.14 avg 4 shots, 8208, 27.3 gr, Hornady 123 SST, CCI primers
2254.38 avg 5 shots, 8208, 27.6 gr, Hornady 123 SST
2267.29 avg 5 shots, 8208, 27.9 gr, Hornady 123 SST
2292.07 avg 4 shots, 8208, 28.2 gr, Hornady 123 SST
2323.30 avg 5 shots, 8208, 28.5 gr, Hornady 123 SST
Bad grouping all shots
4-26-18, St. Cloud mn, 55 degrees
2212.08 avg 5 shots, 8208, 27.3 gr, Hornady 123 ELD-M CCI primers
2248.45 avg 5 shots, 8208, 27.6 gr, Hornady 123 ELD-M
2269.86 avg 5 shots, 8208, 27.9 gr, Hornady 123 ELD-M
2292.36 avg 3 shots, 8208, 28.2 gr, Hornady 123 ELD-M
2312.85 avg 5 shots, 8208, 28.5 gr, Hornady 123 ELD-M
Bad grouping all shots. Sent upper back for inspection while I had my back surgery.
7-16-18, St. Cloud Mn, 80 degrees
2270.00 avg 8 shots, Alexander Arms Nosler 120 gr BT
2101.32 avg 5 shots, 8208, 26.6 gr, Nosler 120 Spitzer
2132.88 avg 5 shots, 8208, 26.9 gr, Nosler 120 Spitzer
2172.36 avg 5 shots, 8208, 27.2 gr, Nosler 120 Spitzer
2205.63 avg 5 shots, 8208, 27.5 gr, Nosler 120 Spitzer
Grouped fairly well. Sulzar firearms took it apart to inspect. Said nothing wrong. Still think they did something. The SST and ELD-M shot horrible previously. Just did a batch of both to try again, hopefully next week. Will let you know how it goes. I did order and installed a 3 lb timney trigger after my last range trip. Went back out to the range with the AA 120 gr nosler for a function test. Grouped allot better.