LOW FILL PSI

[scottinharwood]

If you do not like to do the tuning, then get a tuned B50/51 from BigEd, otherwise use 'The Book' and tune away.  I have 3 McMaster Carr hammer springs left over from my tune if you want one some time.  Also, my B51 is 0.177 cal.

And just one other thing, when the foster fill valve on my B51 started leaking, I was able to take it apart and replace the offending o-ring easily, unlike when my AA S 400 fill valve started leaking - you need special tools or knowledge to strip that one down and repair it.

Scott

[melloroadman]

I have thought about this more and the .177 is what I would probable get after all . But I think I will wait till after the first of the year . Crosman is suppose to come out with another  PCP around then . They have a excellent warranty program and I still question the longevity of the  Bam but then that might not be a issue . But I shoot my rifles a lot and I want them to last . Marvin

[DanoInTx]

I have a Big Ed tuned B51, an AA S400C, and have owned a few other PCP's at this point (Sumatra Carbine, Career 707, FX Black Widow, another B50, TalonSS, HPA converted AR2078T).  The B50 I bought off the shelf was a nightmare, no joke there, but the B51 I bought from Big Ed is just the opposite.  I think the extra couple dollars($25 IIRC) you spend for the Big Ed B51 is well worth it.  Big Ed goes through them and solves any issues so you wont get a dog like the first one I bought off the shelf.  My B51 is one of the most accurate guns I have ever owned, including my AA S400C.  The only gun I've owned that would beat it out for accuracy was my Career 707 II...yes, Korean barrels are made of gold:)  My Big Ed Tuned B51 .177 gets about 35 shots between 850-875fps with Crosman Heavies for around 17fpe.  That is from a 1700psi fill, and refill at 1200psi.  It ends up being around a pump stroke per shot, which is incredible.  The B51 trigger is good, but not as good as my AA S400C or the trigger on my FX Black Widow.  The trigger IS however much better than anything that will ever be done with the sloppy plastic Crosman 2260 trigger on the Discovery.  I have felt some really well modded Crosman triggers, but usually by the time the pull weight is reduced they are pretty sloppy, creepy, and un-predictable....better than stock, but not great by a long shot.  I'm not saying Crosman doesn't make a decent gun, I've owned a half dozen of them, and still own one way in the back of my closet, but they are good for what they cost and no better.  The B51, once tuned correctly is a very good gun for the money.  I personally wouldn't pour a bunch of money into modding a B51 when I could step up to a better gun for the same price, but a well tuned mostly stock B51 is well worth the cost.

Here's a 34 shot string from my B51, start fill 1700psi, end fill 1200psi:



And here's a picture of my AA S400C, hehe, only because I like showing it off:)

[melloroadman]

Dan thanks for the info . I don't know if you have ever shot a Crosman with the lower link mod but it has no slop and it turns out very good really . But Scott did say the B was as good if not better than that so I know I would be happy with the Bam . I still think I will wait till the first of the year be for I do any thing . I have also been thinking of a 10 mm rifle . I thought about de tuning the Discovery and then buying some thing like the B 50 as well . The stock on the B 51 looks high . If you did not use a scope would it be a problem to the point the B 50 would be a better choice ? Marvin

[preez]

Marvin, the comb of regular B51 does seem high, but from what I read the LOP of B50 can be too much for many shooters. Thumbhole stock is much better in that regard. Never handled or shot one though, this is a second hand info.

Chris

[DanoInTx]

I've owned both the B50 and the B51.  The B50 stock is made for overgrown lumberjacks, it does not fit any mortal men.  I use medium rings on my B51 and have no problems, it is not high like the B26-2.  Neither of these guns have open sights though, so you'll need a scope.  I am 6' tall and I cut 1" off of my B50 stock, then reshaped the grip area and it was still the most awkward gun I've shot, including the TalonSS.  It isn't just an LOP issue, it's also the length between the grip area and the trigger, you'd need huge hands for it to fit right.  The B51 in contrast fits me really well with no modification, although I DID reshape the trigger itself because as issued they have a really nasty hook to them.
mine:


I also made a new bolt handle for my largish hands:


The Crosman triggers can be made better, but will never be great.  When you do the pivot mods you ARE decreasing pull weight, but you are also increasing pull length, then you can use some strategic set screws to clean up some of the length, but then you have a fairly hair trigger that still isn't all that predictable.  I did a really nice trigger job on a 2240 a few months back, it REALLY improved the trigger a bunch, but again it still wasn't a great trigger.  The B51 has a good trigger also, not great, but pretty good and better with a little work.  I have a 2260 in my closet that hasn't seen the light of day in over a year,  maybe I'll try a little more trigger tuning and see what I come up with:)

[melloroadman]

Well Dan I am glad you mentioned the no sights front or rear . I am going back to open or peep sights on my rifles so that just about takes the Bam out of the picture for now. Marvin

[DanoInTx]

Yeppers, both are scope only guns, although a handy machinest could easily make a brake with a sight post for the front and then you could use a dovetail mounting rear sight on the back.  Heck, you could even tap a hole in the issued brake and put a threaded sight post up there, like a 5 minute job.  I've been thinking of doing exactly that for my S400C for short range and indoor shooting during Winter.

[melloroadman]

This is all very true Dan and I thank you . I will keep it on the list then . I am just trying to keep from buying more rifles than I have to . I have to watch the wallet very closely now that I am not working. And I like to shoot a lot and if I become rifle poor I will not be able to buy ammo . I have been thinking on saleing or trading my springers off to get different PCP's and pumper's since I fell hard into the dark and bought both a tank and compressor . Marvin

[Jaymo]

John, which end of the hammer did you face off? Did you take that 2mm off the front or off the back?  I want to get the best compromise of power, accuracy and shot count, with emphasis being on power with heavy Eun Jin pellets, and accuracy. I don't want the power as a substitute for accuracy. I want it for flatter trajectory and more killing power. I'd like to get consistent, maximum expansion with Crow Mags, and maximum range and penetration with Eun Jins. I bought mine to be a hunting rig, not a target rig, though target worthy accuracy would not be unwelcome.

[Jaymo]

You could drill and tap the front barrel retainer for a shotgun bead sight and install a fiber optic front. Then install a rear sight on the barrel, or the receiver. I used a cheap Daisy dot sight on my B50 when I first got it, while waiting for my scope and rings to arrive.
I was thinking about installing a larger diameter barrel, and either dovetailing it for a front sight, Or mounting a B30 front sight on it, and then install a peep sight on the receiver. I have this sweet #4 Lee Enfield micrometer sight that would be sweet on the B50. Of course, if I use it, I will need to make the front sight adjustable for windage, or make the rear sight mount adjustable for windage. I've seriously thought about ordering front and rear sights for a B30 and install them on a larger diameter replacement barrel. Or maybe even order a B30 barrel also, and lap, recrown, and cryo treat it and install it on the B50, along with B30 sights. I've been thinking about installing iron sights on my B40, also.

[scottinharwood]

Marvin, you are my God!

Hey, can you move to harwood Maryland so I could use your compressor???????  I will let you shoot my B51....

Ah well, didn't think so.

I really like regulated PCPs, but the high pressures involved  make them a tiring choice for a hand-pumper like myself.  Been trying to work out the horse power and motor requirements for making a low RPM linear-stroke mechanism for my Hill pump, only wish I had a machine shop to build it in.  I went to a gun show in Fredrick Maryland about 5-years ago and had a chance to buy a compressor for $900.  Should-a, Could-a, but talked myself out of it - stupid, stupid, stupid...

I pump, I pump then I'll pump some more, hi ho, hi ho, hi ho, hi ho, h iho, hi ho.....

So, its either a souped-up Big Ed tuned B51 in 0.22 for me or an AoA BSA Super Ten, decisions, decisions...

Scott

[melloroadman]

Yes my big bore likes its protein . Click on the specials tab Marvin
http://www.protecair.com/