Well, no R7's to be had from where I had placed an order. So, back to the HW50S...
I read where JM advised some to "set" their spring by leaving the rifle cocked for two hours. This was on springs he sold. Would you do this to a stock Weihrauch?
Yes and no.
When replacing a spring, I always use a piece of all-thread and crank it down to 100% coil bound, and let it sit for a bit. Makes installation a little easier.
But a new gun from the factory? I'd just shoot it for a couple hundred rounds before messing with it.
As JiminPGH said, the main reason to set the spring is simply to make a new one easier to install. Once it's been in there a while, as in a new factory gun, it's as set as it's gonna get.
To illustrate...I recently installed a new JM spring in an RWS 34. Used a stout spring compressor, so did not bother to pre-set it. It started out significantly longer than the OEM spring, but a week later I took it back out and found the two were the same length.
As JiminPGH said, the main reason to set the spring is simply to make a new one easier to install. Once it's been in there a while, as in a new factory gun, it's as set as it's gonna get.
If it's "as set as it's gonna get" why can't I leave it cocked? ?
If it's "as set as it's gonna get" why can't I leave it cocked? ?
Decent question. It has to do with time, and the difference between elastic and plastic deformation. If the spring is not allowed to relax for a long period of time, it will start to deform into more of its compressed shape. Elastic deformation is recoverable, plastic deformation is not. This happens a teeny bit every time you cock the gun, which is why springs lose their oomph over the years. Leaving it cocked for a long time is equivalent to taking many thousands of shots, or the equivalent of the amount of time its cocked per shot.
As JiminPGH said, the main reason to set the spring is simply to make a new one easier to install. Once it's been in there a while, as in a new factory gun, it's as set as it's gonna get.
If it's "as set as it's gonna get" why can't I leave it cocked? ?
It really is a matter of WHERE you want the spring to "set at".
😉
Modern springs can be left cocked for a day or two and IF they loose a little energy on the first cycles, they will regain their performance after 3 or 4 shots, or after a day or two of rest.
Now, leaving a gun cocked for a month . . . that's another can of worms.
HTH
HM
Well, no R7's to be had from where I had placed an order.
If you act quick enough, it looks like PA might actually have some R7s in stock again. But don't waste any time if you really want one. When I got mine in February their supply didn't last long at all!
HW 50S allready shipped... Oh well, with two presafeties I should be happy. Plus, more exciting HW news tomorrow...
Just shoot 'em
I got an in-stock notice from PA on Wednesday night (9/1) advising that R-7s were back in stock. I'd been searching new ones for months. Delivered today!
Well, no R7's to be had from where I had placed an order. So, back to the HW50S...
I read where JM advised some to "set" their spring by leaving the rifle cocked for two hours. This was on springs he sold. Would you do this to a stock Weihrauch?
Deleted reply.
Excellent post, very interesting and so is the compressor!
Air gun springs are over stressed by design. Normal use springs are designed to be use around 70% compressed. So setting a new spring by JM’s recommendation is well worth the effort IMO. By a “controlled pre-set” I have found that they do not “cant” after use.
When I set a new spring I use a similar setup of all-thread and washers. I typically crank it down to coil-bound then release it. I don't let it "steep" when fully coil-bound. It makes installation a little easier, and I let the gun do the rest. Your mileage may vary.
For a spring compressor I use a padded 50" GROZ sash clamp. It has a long "ram screw", a very stable cast iron head with drawn steel bar. I bought mine at a WoodCraft store..............
As JiminPGH said, the main reason to set the spring is simply to make a new one easier to install. Once it's been in there a while, as in a new factory gun, it's as set as it's gonna get.
If it's "as set as it's gonna get" why can't I leave it cocked? ?
As Jim explained in much better detail..."set" and "squashed" are two different things, LOL.
