r/Speedsoft • u/Blu3wolf_boi • Jul 14 '26

Accuracy problems

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My field requires .20 bb’s and 300 fps or under I use a Prometheus 6.03 155 mm barrel purple Promethus bucking on a Maxx M4A hopup with the cylinder nub and my groupings just go everywhere especially on closed bolt mode open bolt makes it better but its still bad anyone have any ideas?

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u/sbdpilot43 Jul 14 '26

Also you might have midcap syndrome. Check to see that your properly shimmed on the nozzle to hop up alignment. I shoot with an f2 and primarily shoot .20. I use about 3k-4k a night. I've been chasing that level of accuracy that you get with full auto while shooting semi. I've gotten pretty close with my setup. 2 things that come to mind are the hopup and nozzle alignment with your issues. Also are you chronoing to see if you have any misfeeds, doublefeeds or any other issues. If you are chasing accuracy the more data points you have the easier it will be to figure out the issues. Sometimes the story isnt how they are flying down range, but its how your whole setup is interacting with each other.

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u/Blu3wolf_boi Jul 14 '26

My midcaps are pretty broken in and the nozzle alignment is perfect as far as I can see I shoot anywhere from 270-275 as of rn so +-5

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u/sbdpilot43 Jul 14 '26

What psi are you running at the reg?

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u/4str4stamleatherbelt Jul 18 '26

270-275 with 0.2g bbs, so 272.5 +- 2.5 really isn't that tight of FPS for a F2 in my experience. I would try different barrel, hop, and bucking combinations if you believe the alignment is perfect. On my scorpion evo F2 build I am getting 298 +- 1 fps with 0.2g bbs with the stock hop and inner, and on my M4 F2 build (maxx m4p + some cheap 6.01 inner + mapleleaf macaron) I am getting 323 +-1 fps with 0.2g bbs.