detuning magnum springers to medium power ???

[BobbyHumphrey]

   I've  read that the 135 has a larger swept volume than the 125. But it uses the same spring. Seems like you could squeeze more power out of a 135.

[Paul68]

Yeah, the 125 and 135 share the same 120mm stroke, but the 135 has a 30mm tube and the 125 29mm.

[D14Jeff]

well here's what i'm thinking .... since it's impossible to get a sniper barrel for the 135 the 125 sniper is next on my list . of all the plastic stocks i see on sub $300 AGs it's the baddest butt looking by far IMO . it also seems to be the most ergonomic with it's adjustable length and comb , and i like grippy rubber sections . the action still has the weaver/dovetail rail and of course the german steel etc. . the camo looks nice , if i can't have beautiful wood i at least want pretty plastic .

i'm thinking of tuning it down to about 700-750ish fps / 17-19 fpe , that should make a very mild shooter considering the weight of the gun FWIU . if i want more power later get a new spring cut for 800-850ish fpe and if i ever can or want to try full power get a full power spring . i'm not afraid to do some smoothing , cleaning , polishing and lubing . i like tinkering

any ideas on how many loops to cut off the spring to get it down to 700ish in .22 with 14-15 grain pellets ? looking on forums they seem to have 3 to 4 inches of preload ......

[D14Jeff]

ok ... lets try this ......
will a hatsan 135 detuned to closely equal the FPE of a hatsan 85 be easier to shoot ?

[Paul68]

Yeah it would. But it wouldn't be as easy to handle as an 85.

[triggerfest]

And what would be the influence of the caliber according to you in this whole story ? They say that a larger caliber is more easy to handle in a magnum springer though...

[D14Jeff]

in .177 most pellets will want to go supersonic limiting selection to only heavy to very heavy pellets and increasing pellet cost . .25 is expensive and there's no place nearby that sells them so they will have to be ordered and shipped . .22 is the winner to me .

i did a lot of late night web searching on this last night a detuned xs28m from MM with his basic tune is a much simpler option . i'll know everything will be done right , and it's much easier to find parts for it too since it's based on the rws 350 . it also has a wood stock . but i'll want a LDC for it ..... anyone know what the barrel diameter is on the xs28m ? and are the diameters the same for .177 , .22 and .25 ? it's much easier to find parts for it too

[D14Jeff]

looks like it's 15mm , same diameter as the barrel on a AR2078 .

http://www.wolfairguns.com/product_info.php?cPath=25&products_id=37
$46 shipped ..... seems very reasonable .

sorry for being so wishy washy .... LOL .