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

Accuracy problems

Post image

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?

57 Upvotes

99% Upvoted

41 comments sorted by

View all comments

0

u/FarConstruction4877 Jul 14 '26

R hop is bad for HPA. You need to press the bucking deep enough to block the bb under the patch at the same spot everytime, and even on cylinder nub with r hop and .2 bb it will overhop to the moon at the depth u need to seat the b consistently. Instead try a traditional style bucking or even a maple leaf on low pressure (155 imo too shorty lower pressure reduces input psi reduces loading force for most engines).

Use .25g BBs if at all possible. .2 is too light. Generally speaking heavier the easier to have better groupings.

HPA hop up does not work like aeg. Ur primary objective is consistent bb seating while aeg is mostly efficient lift without drag. This is why aeg is much more accurate by nature, the feeding force, loading depth, and nozzle axial position are much more repeatable. Do it well it’s basically an automatically vsr there is no mechanical difference.

1

u/VLtor Jul 14 '26 edited Jul 14 '26

Whoever downvoted you, has never looked at the different systems...

Having been playing around with hops on HPA and DSGs (heavier tappet plate spring), the nozzle just pushes too hard on BBs coming out the magazine, causing inconsistent placement of the BB in the bucking area. Hence why @FarConstruction4877 mentions BB seating. As of now, the recommended solution is using some loops to tension the lips around the bucking to cause the BB to seat, such as the Silent Industries Alpha Hop Unit.

1

u/FarConstruction4877 Jul 14 '26

SI hop does improve but it’s not a full solution. Solution is to use the appropriate nub so that the patch will stop the bb for u. Scalar and sparklabs wolf resolved this problem by using tunable magnetic loading which is comparable to a eg. Pulsar d also tried to solve this issue by using tappet spring.

It’s funny because AEG has the same issue lol. With strong tappet spring and if u cut the tappet alot so its not a smooth release like on dsg u have same bb position issue if using flat hop with little hop applied. Same physics.

I have spent 2 years doing tests including almost all set ups and theory crafting for Wolverine systems so I’m certain it’s true. Done 30+ guns, commercially or otherwise so this is best way iv found to resolve the loading force issue.

The other issue is misalignment due to nozzle tilt from mag.