Tuning the Benjamin Marauder

Forums PCP Airguns Tuning the Benjamin Marauder

  • Views : 20677
  • Link

    NMshooter
    Participant
    Member

    Make sure the bolt is greased and keep shooting. The stiffness does loosen up. If the rifle is tuned for power, it will take more effort. My .22 is set at about 28FPE and is quite easy to cock.

    Link

    Smaug
    Participant
    Member

    Great thread. I just now stumbled upon it, since someone bumped it. I pasted it into the video description of my recent Marauder review update.

    Link

    ajshoots
    Participant
    Member

    I have tons of other things I would like to add, but everytime I start a reply to add things, I erase it. Just too much for me to want to type. Doesn’t help I do 99% of my Internet use from my phone. Not the easiest for me to type on.

    Kind of why I prefer people who need help to just call me. I can talk and work but not type and work at the same time.

    Link

    396ranger
    Participant
    Member

    Just received my new wood stock marauder and it looks great!!  Installed a 4-16×40 center point scope on it also and that seems like a really nice scope.  Just put about 60 shots threw it sighting it in some (high winds today and cold). I was only able to fill it to around 2600psi since the shop that filled my tank shorted me a little air.  So far I have been shooting 20 rounds and refilling back up and getting 1″ groups 25yard with a yuck 25mph wind gust.    Purchased the Benjamin carbon fiber tank assembly for filling. 

    Ajshoots thanks for for all the info posted it will be a great resource this spring when it gets nice out to tune in the rifle. 

    Link

    yohon
    Participant
    Member

    Hi, I am hoping you have some ideas for me,  I have a Mrod that has a lot of  mods. it is very  accurate despite a very bad power curve, I tune for as much fpe as I can get and want it that way, I dont worry about shot count , I want consistent power out of it. As it is I get 65+ fpe  and that is fine but only in the middle of the string for a few shots. I was thinking of installing a regulator to get a flatter string of shots and would like help to find one that will leave me as much fpe as possible and also allow me to retain my presser gauge that reads tank presser. I have been looking at the Hume 30 caliber regulator because it states in there ad that it works well in a 25 cal if your a power nut like me cause it has more volume  But dose not state if the 30 cal regulator can be used with a gauge that reads tank presser like some of there others. I’m I on the rite track or is this not a good plan.   One more thing I was thinking about is I have a extended air Reservoir on this gun and  wondering if it would be possible or a good idea to drill a hole in it and install a secant presser gauge in it, (if I cant leave it where it is.)  

    Link

    Alan
    Participant
    Member

    If you want both, bottle AND regulate it. 

    One other issue I see. AJ speaks about the barrel band, but in my experience getting rid of it all together is the best bet. 

    Link

    yohon
    Participant
    Member

    Link

    yohon
    Participant
    Member

    not using a bottle using a Reservoir extension
     

    Link

    davemac18
    Participant
    Member

    great read thanks AJ for sharing

    Link

    TheBledy
    Participant
    Member

    AjShoots or anyone else.

    im looking to buy a marauder. So far the best price I see is tgrough PYRAMYD for 499 -75 for a coupon code and possibly an extra 10%off if I can stack coupons.

    Where is everyone buying their Marauders and what’s a good price?  Should I wait until Christmas, will they come in sale? 

    Link

    Mando
    Participant
    Member

    If you buy direct from Crosman using the AGNATION discount code you can get the .177 or .22 for $405 and the .25 for $420. Purchase on a Friday and you also get free shipping. Wherever you buy from make sure that you are allowed to stack coupons and that you can still take advantage of the free shipping when using a coupon. Buying direct from Crosman is one of the best deals I have found. The Marauder is a great gun, good luck. 

    Link

    Crusher
    Participant
    Member

    Nice writeup ajshoots.. Thanks for taking the time to help others with that great info.

    My Gen 1 Marauder 25 came with the mentioned descending tune. I learned the gun over the next few months and ended with a very good tune for 24 shots. On the other hand, my Marauder 177 came tuned to shoot at 965 (JSB 10;s) right out of the box. I knew that was too hot for my pellets from past experience. I adjusted only the hammer spring tension and backed it down almost a complete turn from stock and dropped the fps down to about 900. Haven’t changed a things since. And with an unregulated gun I can still get about 60 solid shots on a fill. Very good for a stock gun. So factory was very close on the tune for this particular 177. And of course “your results may vary” still applies. 

    Crusher
     

    Link

    davemac18
    Participant
    Member

    “Mando”If you buy direct from Crosman using the AGNATION discount code you can get the .177 or .22 for $405 and the .25 for $420. Purchase on a Friday and you also get free shipping. Wherever you buy from make sure that you are allowed to stack coupons and that you can still take advantage of the free shipping when using a coupon. Buying direct from Crosman is one of the best deals I have found. The Marauder is a great gun, good luck. 

    
they are coming out with a new versions with a new barrel and regulated in case you wanted to wait for that, not exactly sure on release date but should be soon I hope. Thats my plan for now

    Link

    beachbumpete
    Participant
    Member

    Well I just bought my FIRST marauder.  I got it from a member here and he said it was basically untouched out of the box from him.  I bought it for an informal FT rifle with the intentions of tuning it to 12ftlbs.  It is of course a .177  caliber.   I must have just lucked the hell out reading this thread because this thing is quite amazing.  I DID take it apart when I first got it after a little informal plinking to see what it was doing.  It was shooting VERY hot at over 1k FPS.  I took down the trigger, removed the lawyer spring, polished some of the surfaces and made some MUCH needed adjustments.   It now breaks very clean with a nice two stage setup.   Short take up then a light wall that again breaks clean.  Adjusting the power was a bit more of a puzzler. I did read the manual and some info online but I was able to get it to 12ftlbs consistently.  It does give an amazing number of shots at this power level even without a regulator or HDD or any other aftermarket parts.  I have been shooting it sitting in the FT position at my indoor and outdoor range and it is honestly and truly as good as any of the higher end PCP FT rifles I have owned including Air Arms Pro-Targets, Daystate CR rifles, even my own scratch built PCP FT sidelever rifle.  The only thing honestly holding it back is the stock honestly.  It does have the adjustable cheekpiece which is NICE but it is very lightweight and the foreend could be wider.  It could use a tee slot underneath allowing for adding in some hamster or other lift mechanism.   

         I was also quite surprised at how well it was made.  I read several comments on quality of manufacture I did not see anything in there that was less than adequate having been inside MANY precision airguns that is saying something considering the price point.  I will try to eek out every ounce of accuracy I can from this rifle but again right out of the box with the factory barrel it is very very good.  I may have to buy another one here to tinker with.   I had been interested in getting a big bore PCP like a .25 or .30 caliber to play with at some point.  This platform would be more than suitable for it.  I am enjoying reading about the mods people are making on these things however.  I DO plan to custom machine a nice droop compensated picatinny rail for it tho at some point if not just to raise my head up a bit.  Thanks for sharing this information however it is interesting to read…

    Pete

     

    Link

    Saltlake58
    Participant
    Member

    Pete – 
    ​I think it comes down to how much you want to spend.  The Marauder is a great gun, but the base model was never designed for Field Target.  It was originally designed as a hunting gun, just a lot of us started with Marauders as an entry level, and found out we REALLY LIKE THEM!

    ​I’m still learning how mine works and how the adjustments and pellets impact accuracy, power, shot count and all the rest.  I found a tune combination on my gun (.22 caliber, Crosman Premier Domes 14.3 gr., your mileage may vary) that gives me 30 shots that averages 825 fps, with a standard deviation of 6.25 fps.  It can be done, and with a 12 foot pound tune, you should get lots and lots of shots per fill.

    ​Next goal is to start working with JSB Exact Heavies.  Want to tune them to 830 fps.  I had the gun tuned for the exact heavies, but was only getting 20 shots per fill.  Need to find a more economical tune if possible.

    ​That’s the beauty of the Marauder.  Once I know the tune settings, if I want to change from one pellet to another, I just reset to those settings.  Great gun for that type of work.

    ​Next gun is already on the docket.  Crown or a RAW, but probably a Crown.  Probably early next year.  You’ll probably go through the same experience.

     

    Link

    Saltlake58
    Participant
    Member

    Tuning a .22 Marauder for JSB Exact Heavy Pellets at around 830 FPS

    ​Does anyone have a setting for the Hammer Spring Pretension, Striker and Fill Port adjustments?

    ​I’ve had it tuned at 830FPS, but only got 20 shots per fill.  Looking for a more efficient combination!

    ​If anyone is wondering, I get 30 shots on Crosman Premier Domes at 830fps using:

    Hammer Spring      1.25 turns
    ​Striker                     4 Turns
    Transfer Port          2 Turns

    ​This gives me:
    Average speed     825 Feet per second
    Std Deviation            6.25 FPS
    ​Minimum speed    811 fps
    ​Maximum Speed   836 fps
    ​Max Variation is       25 fps
    ​Foot pounds energy 21.6

    ​I was impressed with this tune due to small variation.  Not quite like having a regulator, but close.

    Any help with the JSB Exact Heavies is appreciated in .22.

    Thanks,
     

    Link

    beachbumpete
    Participant
    Member

    Well like I said in my post this is NOT my first PCP nor is it my first FT rifle.  I do not see any reason to buy either of those rifles you mentioned.   Not that they are not fine rifles but they just have no interest for me.  I bought this rifle as an inexpensive means to get an FT PCP rifle and it is more than adequate for that task.  Believe me I have shot most of the finest FT rifles available at one time or another.  I am much more of a springer guy and would rather spend money on an HW97 or perhaps an LGU than a high end PCP.  If I WAS to spend the cash for a higher end PCP it would probably be a Steyr or FWB.   I have a weakness for the match rifles I guess.  either way the marauder is very satisfying to me even without modifications so far.  I need to finish my short stroked RWS54 12ftlbs FT rifle project here so I can start shooting that thing.  Working on a custom picatinny droop compensated rail for it right now.  Good luck with your rifles.  

    Pete
     

    Link

    Saltlake58
    Participant
    Member

    I failed to mention one very important difference that impacted my desire for different guns.  I’m primarily a bench shooter (Late onset version of MD makes walking a challenge, and tripping a real hazard).  Neither rifle I mentioned is designed for FT, that is very true. By the same experience, I meant that everyone I’ve talked to love the  Marauder, but long for more in whatever discipline they enjoy.

    ​Each of us must make decisions based on our, shall I call it, “Specialties” and go from there.

    ​Good luck on whatever decision you make in the future.  I know that even when I purchase the next gun, the Marauder will STAY in my gun cabinet.  I like the gun and it’s proven very accurate for what I use it for.  

    Link

    bigE
    Participant
    Member

    Great info thanks alot…you are appreciated.!

    Link

    goshawk
    Participant
    Member

    Os presento mi Mrod con kit bullpup del famoso Rapid-70.

    [IMG][/IMG]

Viewing 20 posts - 41 through 60 (of 61 total)

You must be logged in to reply to this topic.