The answer to that question is YES! Well 88.75 fpe to be exact! I finally did a power tune on my Mrod and it's a beast! I had a problem though - while shooting it a piece I had installed in one of my baffles moved and a pellet clipped it and it blew out my end cap and the baffles. I found 4 of 9 baffles and only one is good. Sucks but my carbon shroud is still in great shape so I can make a new tip and make this thing a little more quiet again.

So I took what I learned from the 22xx based guns and did the same thing to this valve. It's amazing! It shoots 43gr Eun-Gin pellets at 964.2 fps for the first shot and 943.4 for the second shot and 885 fps for the forth shot - this is with a 10# spring installed - I wasn't able to run it through the chrony with a stock spring but I estimate it shooting a 43gr pellet around 900fps - I compared it to my custom 70fpe .25 cal rifle and it was shooting harder than that one. Someone on the marauder site asked if a Mrod could dump it's power in the first 3 shots and able to shoot a 43gr pellet at or near 1000fps - I thought I would try it and I came pretty close. I think I could gain a few more fps but it's pretty much maxed out. I liked the way it was shooting with the stock spring at full compression cause I was getting 8 good power shots compaired to the 10 pound spring.

43gr. pellet doing 964.2 fps / 88.75 fps - is awesome!

I know some guys are gonna say power isn't anything without accuracy and I know that. I've seen .25 cal rifles shoot 25gr pellets over 1050 fps and they aren't having any issues - event the full auto is shooting accurate so I don't see why this one won't. It was shooting very accurate before and it's shooting 1 hole-ers at 14.4 yards now (yes that's a small distance but it's still good). Once I get some new baffles I'll do a accuracy test at 50 yards and more.

here's a couple snap shots of the chrony

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Dave

but the guys I saw hitting that mark was with 53gr pellets. I couldn't find anyone (not saying that there isn't) that was getting more than 69fpe with a 43gr. pellet. I searched a few forums but couldn't find much info on guys doing high power tunes on their marauders.

I've posted pics on here before but here's another shot of it - I did add a grab rail under the forearm but it's not in the pics.

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I couldn't find a pic of it but I found the post where you guys talked about it and I found the post where he said he got it up to 100 fpe. That's awesome! I was working on a 9mm 2250 base until I got the mrod and I put the 9mm on hold. I'm planning on building a 9mm or bigger this winter if I have a little extra cash.

It was filled to 3200 psi. -  I think I could get a little more out of it because I'm using a custom valve stem and it's about 1/32" shorter than the stock one so if I get a stock length one in that might push it a little more but I'm in no rush. Once I get the shroud fixed I'll do some more power testing then I'll turn the velocity screw in and tune it down a tad. I'll  probably run the stock hammer spring too. There's more I want to do but funds are limited at the moment so those plans are on hold, when I do it I'll be sure to post it on here!

 here's a link that you can order a 5 pack for just over 4 bucks - I don't know what shipping is but I read you pay about 10 bucks shipped. This spring cost me $1.29 - don't buy them off the forums, some of those guys are buying that 5 pack and then selling each spring for $13 each.

http://www1.mscdirect.com/CGI/NNSRIT2?PMPXNO=1762693&PMTERM=06812143