[Rehab_Monger]

I've just recently purchased a minimag (#MM03579) with a level 10 bolt.

The marker cycles just fine and does not leak, but if I try to shoot faster than 2 or 3 shots a second, the velocity drops dramatically. 300, 200, 100, dead...

When I back off the trigger, give it a second to recharge - I get a nice crisp shot.

I put a brand new Ninja SHP reg on my tank - so I seriously doubt its the regs problem.

Any ideas as to what causes this or would fix it?

[sQuidvision]

Put 5 drops of oil in the Asa, take off your barrel and dry fire a bit... The valve may just be a little dry.

If that doesn't do it check the tension on your field strip screw... Could be too tight or too loose.

[Rehab_Monger]

I took the ASA off and replaced it with a deadlywind foregrip. I have a steel hose going from my on/off to the valve.

I'll put some more oil into the valve, but it's already pretty heavily coated.

I've tried tinkering with the field strip screw, setting it loose or tight, and it has had no effect.

[WillIbe]

When looking at your gauge on the bottom line ASA, see if your pressure is dropping and causing the shot drop. If so, it may be that your on/off isn't turned in far enough.

[Jedihippie]

go grab a gauge and plumb it inline. watch the pressure as you shoot and you can eliminate everything but the valve and sear

[demented pumper]

my bet is the lvl 10 is not properly tuned. ran into the same issue on my egomag

[Rehab_Monger]

Funny enough I have a low pressure gauge on the on/off, and it does not drop when I fire - therefore I was ruling out the chance that the reg was bad.

I thought the lvl 10 was tuned since it was operating (firing) with no leaks before, during or after a trigger pull. But I can easily rip it apart and start over from scratch again.

[demented pumper]

lvl10 can also fire with a carrier that is to tight which will cause issues. i would just go up 1 carrier and see if it leaks. if not then keep going until it does then go down 1. then see how it shoots. also check ur spring length

[KartaKeeper]

with the tank off, remove the back regulator pack by unwinding the velocity knob, remove the spring pack and the brass piston, clean the piston and anything gunky inside, replace and lube the o-ring attached to the brass piece.

this should resolve the issue

[DMex]

If Keeper's advice doesn't unscrew it, ck your ASA. Make sure it isn't pushing the valve pin on the tank reg in too far which will cut the pressure in half or completly to your marker.

Or you could have an old style on/off and might be upside down. It usually leaks too but not all the time. The old style on/off looks like a castle tower.

[Rehab_Monger]

I'll try all of the above and hopefully it is resolved.

I know the on/off can give some serious problems on occasion (assembly being one). Luckily for me they have a laser etched picture on the valve for me to follow.