The std hull cartridge hw80 is 3mm .. the west German version is 4.2mm std The venoms usually are 5mm the bigger bore and correct spring and turning gets the pellet to the barrel end just as the piston slams the wall .. Going from 3-4mm will increase power massively and reduce recoil not really a bad thing if your cutting down the spring
Engineers Beeman, have made its model R1 very technically competent, reliable and self-sufficient a rifle.Otherwise, Weihrauch wouldn't lick Beeman shoes,tearfully asking for cooperation. I repaired them enough and realized that the bypass is categorically not worth touching. If you want to raise or lower the power of the rifle,pick up the spring. A very interesting option is obtained with a cut to 32 turns of the spring from Gamo Hunter 1250.So I guess you just killed a good rifle.
"The Beeman R1 and pointed out Dr. Beeman was the main force behind the invention of the R1/HW80 and that Weihrauch did an outstanding job of production engineering and manufacture."
no sir beeman came to germany with a idea for a high speed springer ,and herman weihrauch made the r1 first exclusief for Beeman who was the importer from weihrauch ,.after a few years weihrauch made the hw 80 also under there own name .
Please let me know whether reducing the TP increase power or reduce power.. I need more power of my gamo big cat so it's important for me to know this bro ..
It's generally best to leave it alone. The temptation is to make it larger seeking more power, but for a spring rifle what you want is efficient transfer of energy from the spring to the pellet and for it to happen smoothly. If you open up the port you can increase the slam effect of the piston causing a more violent forward recoil which is a bad thing. For a given rifle and pellet combination there will be an optimum diameter for the port which depends on many factors. My understanding is the manufacturers have already determined what size TP works best in general and little if any performance will be gained by altering the port. If too much material is removed it makes the gun worse not better, and as you can see it's not that easy to reduce the size after you drill it too big.
if a transfer port is kept small by the maker to get it legal in certain country`s , you could open it up to the fac model. but a larger hole will result in a cooler air because of the lower compression and then you less gas volume
Phil Bailey the reason no one wants to talk about it is it’s an easy power increase and the reason that gun has a 4mm port is either because it’s an fac version or a foreign import, 4mm == fac 2mm hole uk spec simples 👍👍
it could do. Depends on how you do it. If youve got to big of a hole the piston slams down and makes the gun slammy with a kick and generally not nice to shoot. A rite but wrong way of thinking of it.... Were looking for the perfect fart Imagen you had a fist sized arse hole. Every time you farted it came out with a hupppphhhttt.... A sort of gasping sigh sound Not good Imagen you had an arse hole the size of a pea. Every time you farted it would vrrrrtttttttttttt..... it would be so high pitched only dogs and dolphins could hear it! Again not good You have the perfect sized arse hole. Every time you fart you get a parp!!!!! A perfect text book bollock rattler parp!! Perfect
hello sr, so what's a good transfer port size for a .22 cal magnum springer thats under powered?. i mean: i changed the spring to a vortek pg2 witch was supposed to give me over 850 fps with a 14.3G pellet, but im only getting 730 to 750. changed all of the seals and still same power. originally it was down to the 680's 690's but added a second arm linkage spring and it raised the fps to the 750's but im still a 100 fps underpowered. i got a third spring witch is larger wire gauge for more power, but i did not installed it i need to cut the coils and i just didn't do it, so my next big idea was to enlarge the transfer port before installing the larger spring what you think?
