JCinPA
.270 WIN
I am so disappointed! I was super excited after seeing the TFB TV test of the Mossberg 940, and all the videos of 930 owners after the OR3GUN mods and their perfectly functioning guns.
I've installed the OR3GUN Multi use Marine Spacer Tube, and the Competition CSP/ASR set, and had hoped for perfect function. One thing I did was set the ASR to +5% because the CSR is -10%, attempting to be closer to manufacturer specification. Maybe I should back the ASR out one notch and try again, any thoughts? That's the only reason I can think of. The MST is to prevent moisture retention and crudding up inside the tube, as I understand it. I may need a full 10% reduction in spring rate or I won't get reliability I need? Oh, and I bought a boron nitride coated piston from Mossberg, though it was likely not needed.
Notes from the shoot test with about 200 rounds of 1145 fps and 1200 fps target rounds, and various full power buckshot and slugs and the Federal LE low recoil 00 Buckshot LE13200, are below. For the most part all the 1200 fps target rounds and heavier stuff all worked. The LE132 all worked. It was when using Herter's (Cabela brand) and Winchester 1145 or 1150 fps target loads mixed with the others that I had issues. Like the TFB TV guys, I loaded all sorts of stuff all mixed up and had issues only around the really light loads, either before or after, except for one 1200 fps target round FTE in a load of all 5 the same round.
- Around 30 rounds in slug failed to feed after slow target round
- A few rounds later a slow target failed to eject
- About 70 rounds in a Herter's (1150 fps) FTE, last of 5 shots
- About 80 round in the 3rd Herter's in 5 of same FTE
- About 90 rounds in a Winchester super target FTE right after a slug round
- About 100 rounds in slug FTF after a target round
- About 125 in target FTF after LE132 buck round
- About 150 in another Winchester super target failed to load
Eight failures in about 200 rounds, a 4% failure rate. My plan, as I said, is to move the ASR out one notch, clean thoroughly and try again. Any other thoughts from you gurus?
I've installed the OR3GUN Multi use Marine Spacer Tube, and the Competition CSP/ASR set, and had hoped for perfect function. One thing I did was set the ASR to +5% because the CSR is -10%, attempting to be closer to manufacturer specification. Maybe I should back the ASR out one notch and try again, any thoughts? That's the only reason I can think of. The MST is to prevent moisture retention and crudding up inside the tube, as I understand it. I may need a full 10% reduction in spring rate or I won't get reliability I need? Oh, and I bought a boron nitride coated piston from Mossberg, though it was likely not needed.
Notes from the shoot test with about 200 rounds of 1145 fps and 1200 fps target rounds, and various full power buckshot and slugs and the Federal LE low recoil 00 Buckshot LE13200, are below. For the most part all the 1200 fps target rounds and heavier stuff all worked. The LE132 all worked. It was when using Herter's (Cabela brand) and Winchester 1145 or 1150 fps target loads mixed with the others that I had issues. Like the TFB TV guys, I loaded all sorts of stuff all mixed up and had issues only around the really light loads, either before or after, except for one 1200 fps target round FTE in a load of all 5 the same round.
- Around 30 rounds in slug failed to feed after slow target round
- A few rounds later a slow target failed to eject
- About 70 rounds in a Herter's (1150 fps) FTE, last of 5 shots
- About 80 round in the 3rd Herter's in 5 of same FTE
- About 90 rounds in a Winchester super target FTE right after a slug round
- About 100 rounds in slug FTF after a target round
- About 125 in target FTF after LE132 buck round
- About 150 in another Winchester super target failed to load
Eight failures in about 200 rounds, a 4% failure rate. My plan, as I said, is to move the ASR out one notch, clean thoroughly and try again. Any other thoughts from you gurus?
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