Calling all 25 cal marauder REGULATED guns

[ShawninIL]

Thanks Travis.

[ShawninIL]

Got the Hill regulator kit installed and first string seems pretty good.
JSB 25.39 Running Hill valve,gauge block, hammer and spring,stock striker, Hill hi-flow TP and Audrius reg
1.  832  3000
2.  842
3.  843
4.  842
5.  843  2800
6.  840
7.  846
8.  840
9.  847
10.847  2650
11.843
12.843
13.845
14.844
15.847  2500
16.841
17.844
18.842
19.842
20.840  2350
21.846
22.843
23.852
24.848
25.842  2200
26.850
27.851
28.843
29.848
30.848  2000
31.848
32.856
33.846
34.843
35.844  1900
36.844
37.847
38.847
39.847
40.843  1750
41.844
42.841
43.836
44.839
45.831  1600
46.830
47.825
Any thoughts or suggestions are appreciated.

[shorty]

Congratulations!!!!

Welcome to the 40/40 tune on your first try. String looks great to me. Looks like the first 40 shots from 3000psi to 1750psi is running around a 1.62 efficiency. Well done.

[ShawninIL]

Thank You Sir, I thought it looked pretty good, but I wanted to hear opinions of the resident experts.
Mr.Hill deserves most of the credit for putting all the parts together, all I did was install them without cutting the o rings, then turn a few screws.

[Dairyboy]

That's great!! Might need another .25 Mrod to have 2 regulated .25s 

[ShawninIL]

That's great!! Might need another .25 Mrod to have 2 regulated .25s 

Oh believe me, I would have had another one when the $399 deals were going on but none of them will ship to this stupid state I live in! One for high power, one for lower power and whisper quiet.

[Dairyboy]

Lol I'm thinking about it as well a 60 fpe and a 40fpe mrod

[PBguns]

Nice another 40/40 member! Well done!

[Ozarkairgunner]

Hey guys, sorry I haven't posted in a while been really busy with work. Still haven't been able to get my 40/40 to quite work out for me. Currently bumped my reg up just a bit and sitting just slightly under the 2k set. I have drilled out my valve and barrel transfer port to the 3/16" and using some refrigerator tubing as a transfer sleeve that has the same 3/16" opening, I turned my bolt probe back a bit to allow the air to travel a bit easier, been working with the SSG set but seem to keep getting stuck with the same results. I'm currently getting getting 34 shots before falling off the reg and have a good looking string averaging 741fps with the JSB heavies which gives my just barely 41fpe. Don't know what else to do??? Any ideas?

[PBguns]

My first (and for the most part my current) 40/40 tune is using a modified WAR SSG.....I haven't been on the forums much in the last month or so. Just a quick "check in" every now and again.
Back when I started on my regulated build more than a few told me "a 40/40 type tune just wouldn't work well when it came to a regulated .25 mrod" (now look what we have accomplished)!
I noticed Travis has the TSS now...I need to read his thread in depth when I get a chance, hopefully in the next day or two.
Thinking I might buy one of those....and see what I can do with one of those w/ my tune.

[shorty]

CJ,
Your real close and seem to have just about everything to do the job. I can only think of couple things that may be preventing the 40/40 tune.

Leaky transfer port sleeve, incorrect SSG adjustment, barrel port alignment to transfer port.

To see if you have a leaky transfer port sleeve:
Load a pellet in, remove the magazine, place (lay or drape) 1 sheet of TP (toilet paper) over the receiver. Fire. If the TP fly's off, you need to work on the transfer port sleeve or your barrel Oring is blown out or damaged.
If this is the problem, just buy one from canniborrowsomeammo or hill for a couple bucks.

SSG adjustment:
Have really no idea since I do not use them. All I can say is make sure there is a gap between the hammer face and valve stem.

Barrel port alignment to transfer port sleeve:
Remove the upper receiver from the HPA tube, place the transfer port sleeve in the upper receiver and using the back of a .187" drill bit, push the back of the drill bit though the transfer port sleeve into the barrel port. The back of the bit should be able to go right into the barrel.
If there is an alignment problem, Loosen the barrel by the 2 set screws, place the transfer port sleeve in along with the back of the drill bit and into the port of the barrel (your using the back of the bit as an alignment tool). Tighten down the barrel and all should be aligned.

I really can't see any other reason why your not hitting the 40/40 tune. It would be terrible (funny) if it's just a messed up chrony

[Boomer!]

I don't want to hyjack this thread, but it seems a good starting point. I have a brand new MRod .25. I'm waiting on the air supply. I've read lots about tuning and getting a 40/40 would be ideal. I have enough tinkering skills to make new kitchen cabinets, pull & install toilets & hot water tanks, spackle walls, tie flies, etc. However, I do better from good instruction, like on YouTube.

I was reading about de-pingers, SSGs, FAME, Huma & Robert Lane moderators, trigger spring adjustments, etc. What couple of videos have you seen that are really clear for a NOOB who wants to tinker? What are the 3 things I should do (other than purchasing a chrono)? polish everything down, SSG, Regulator? I read that I can adjust down the loudness/report by re-porting something to a larger diameter. Is this possibly with woodworking tools, or is it going to require purchasing some milling tools?

[Ozarkairgunner]

Hey Boomer,  well as you can tell I'm still a novice myself but there are more than a few videos and threads out there to help a newbie with the Mrod, congrats on getting one by the way. You'll probably get many different answers from many different people for the same thing. One thing you may want to keep in mind is that not everything is a concrete way to do this or that, what works well for some might not work at all for others and it will take a little trial and error for you to find what works best for you. Another note to add is that I wouldn't change a thing until you have a crony so you know what your starting point is and when you do start to disassemble take careful note of where everything was set.
As far as the noise goes, I did bore out the gas exhaust holes at the end of the barrel, inside the shroud, and kicked them back, I laid the drill back at an angle and they're more oval shaped now. This did make it quieter without affecting accuracy. Not a great deal, but definitely noticeable. I wish you the best of luck on your endeavors and look forward to hearing about it.

This video helped me a lot with my first breakdown

Shorty,
Thanks you for your ideas and I out of the thing youv3 listed there is only one that I haven't checked so far and that's the transfer sleeve in the breech. I'll be sure to try that when I get home tonight with a little tissue paper and keep my fingers crossed that that's it. I wish it was just a crony thing lol, that'd make things so much easier, but I doubt my luck is that good. I'm worried it might actually just be that I'm still using a stock valve and valve spring, other than the Huma, everything is still original or modified stock form. I'll probably end up dealing with this as it is for a bit and when funds free up order a Hill valve with the 6lb spring, high flow transfer sleeve,  and possibly the light weight hammer.
I'll admit that it's been a little trying up to this point and I'm a little nervous about taking it back apart and losing what I have, although I probably will trying to work on the 40/40. But for some reason my rifle seems a bit more accurate than before I don't know if it's because of the tune or because I but a thin oring on the shroud inside the barrel band causing it to no longer be "floating"

[shorty]

CJ,
I am using a stock valve too. There is nothing wrong with using the stock valve ported out. Heck, before the reg, I was hitting a 1 shot 90fpe with 43.2 eujins. Since Dairy boy mentioned using 2 guns (one for low power 40fpe and one for high power 60fpe) I am gonna try a 60 fpe string today from my regged 25 cal using those eujins.

That Bob Sterne with Steve from SC additional plenum idea won't get out of my head along with Bob's regulated disco build. That extra plenum makes such a huge difference. I just have to figure out how to get everything tucked away into the stock nicely.

I am also pretty sure Hill valve's are "stock" modified. The only 2 valves I know that are completely custom and made from scratch is the WAR valve and Cothran valve.

[Sfttailrdr46]

CJ,
I am using a stock valve too. There is nothing wrong with using the stock valve ported out. Heck, before the reg, I was hitting a 1 shot 90fpe with 43.2 eujins. Since Dairy boy mentioned using 2 guns (one for low power 40fpe and one for high power 60fpe) I am gonna try a 60 fpe string today from my regged 25 cal using those eujins.

That Bob Sterne with Steve from SC additional plenum idea won't get out of my head along with Bob's regulated disco build. That extra plenum makes such a huge difference. I just have to figure out how to get everything tucked away into the stock nicely.

I am also pretty sure Hill valve's are "stock" modified. The only 2 valves I know that are completely custom and made from scratch is the WAR valve and Cothran valve.

What you guys have accomplished is great stuff I just bought a bunch of parts and when I realised that I didn't have the machine shop tools ( metal lathe and Milling machine ) I just shrugged and shipped everything to someone with a better skill set and the right tools to do it right. So now I will end up with a .30 Marauder Gen II with 80 to 100 FPE and ~14 shots on regulator. I like tour Idea better less expensive and a consistent 40 FPE 40 shot rifle. Keep up the good work

[Ozarkairgunner]

Shorty,
Okay, well I'll keep my fingers crossed and hope that maybe is something simple that I just haven't gotten tweaked properly yet and keep working at it, yeah the added flume would be nice, but I don't see that being something that I'll do unless someone develops a cheap drop in the industry just have to hide in the stock. I'm really really trying hard to keep from spending any more money on the Mrod right now, I've got 2 other builds I'd really like to get done first as well as getting a big bore for next year's deer hunting. I'm planning on converting two 2400kt's to HPA. One will be for the wife as a light weight .25 repeater that she can use for some medium game hunting, and the other I'll use the 14.6" lw barrel on in .22 for a fun plinking and squirrel gun.

[shorty]

Look at that. Seems like max power with 43.2 Eujins is at the top of the knee. Who would of thought, a 60 FPE (Ok 59.4fpe) regulated 25Mrod with all stock MODIFIED parts except for the hammer spring and huma reg.

Now I am real curious to know how many shots at a kitty kat hair away from 60 fpe.

HS   FPS   FPE
0   659   42
1   738   52
2   778   58
3   785   59

Man,
If we,me or someone can get that extra plenum thing going, I can see our platforms hitting 70+fpe on regulation for a clip or 2 and be able to make one adjustment (without taking the gun apart) using the HS adjuster to bring the power down to 35fpe/40fpe for a great shot count string.

I always said I wanted 1 gun that can run the full power gama with just a 1 screw adjustment and not have to take that gun apart to make that change.

[Sfttailrdr46]

Look at that. Seems like max power with 43.2 Eujins is at the top of the knee. Who would of thought, a 60 FPE (Ok 59.4fpe) regulated 25Mrod with all stock MODIFIED parts except for the hammer spring and huma reg.

Now I am real curious to know how many shots at a kitty kat hair away from 60 fpe.

HS   FPS   FPE
0   659   42
1   738   52
2   778   58
3   785   59

Man,
If we,me or someone can get that extra plenum thing going, I can see our platforms hitting 70+fpe on regulation for a clip or 2 and be able to make one adjustment (without taking the gun apart) using the HS adjuster to bring the power down to 35fpe/40fpe for a great shot count string.

I always said I wanted 1 gun that can run the full power gama with just a 1 screw adjustment and not have to take that gun apart to make that change.

Shorty if you have an M-rod Huma Regulator the reg for the Hatsan has the same size air tube but a larger plenum chamber so if you order just the plenum and hog out the Gauge port you should be all good.  your welcome You will loose a little HPA capacity but it will give you added regulated volume . I can't remember which vendor Might be AG exporters that will sell just the plenum

[shorty]

Thanks Don. You gotta know me by now though. I hate fishing where everyone else fishes.

I think if I work hard enough, I can figure out how to add this extra plenum without losing the HPA side and make it a complete drop in part. This one part would be the golden asset for regulating your 25.

If I am thinking right, all you would need is the "extra plenum" , the Huma with gauge port, and an SSG or the new TSS. No need for new valves,porting, or anything else to achieve the 40/40 tune or super close.

[Sfttailrdr46]

Thanks Don. You gotta know me by now though. I hate fishing where everyone else fishes.

I think if I work hard enough, I can figure out how to add this extra plenum without losing the HPA side and make it a complete drop in part. This one part would be the golden asset for regulating your 25.

If I am thinking right, all you would need is the "extra plenum" , the Huma with gauge port, and an SSG or the new TSS. No need for new valves,porting, or anything else to achieve the 40/40 tune or super close.

I get it but I have to confess until I retire and have the opportunity to learn the metal lathe and milling machine I have to rely on others for all the heavy lifting since my knowledge is all second hand where modding is concerned. If all goes well I plan on building a >22 gen II Marauder with longer TJ's Barrel and upgraded longer shroud with more baffles to keep the beast backyard friendly . I will also set it up with a longer Titanium air tube and regulator to maximize power and shot count