Author Topic: XS60C PCP Repeater project (Read 455946 times))

avator · « **Reply #360 on:** May 21, 2014, 05:14:31 PM »

numbers shmumbers... I just want to shoot something............with all due respect.

Naa.. you know how I feel about what you guys bring to our sport/hobbie/addiction.

stalwart · « **Reply #361 on:** May 23, 2014, 04:48:20 PM »

Well guys, it's almost done... I need your help with shroud/LDC ideas, but she shoots!

I went with a slip coated receiver and striker, set the safety up to quietly click going on or off... without the auto feature (not a fan), and cut a sweet barrel to 11mm.

I can run it dry in about 10 seconds... not LHO speed, but a good way to dispose of pellets. It feeds wad cutters smoothly, should be tons of fun!

Anyone seen an off center shroud they liked? This set up fits o-rings in the barrel band, but I can fab a full length shroud as well. I could sure use some guidance here, my first .177 repeater will get my very first shroud...

student1946 · « **Reply #362 on:** May 24, 2014, 01:46:08 AM »

You could try a half shroud like TKO makes for the Fusion/xs60.The best LDCs have used came from Neil Clague.If you are going to make your own you may have your own ideas for a design.Or you could use it without one and just yell"Fire in the hole"before each shot.Anyway, nice looking work.

stalwart · « **Reply #363 on:** May 24, 2014, 12:43:49 PM »

Thanks, T.

I want to make something myself. I have a TKO (currently on a long barreled P17) and am extremely surprised how effective they are. It's simple enough.

I'm wondering if there are "rules of thumb" that I can use for a starting point. It wouldn't be hard to simply oversize everything, but I want to keep these agile... and I want this one very quiet.

stalwart · « **Reply #364 on:** May 24, 2014, 03:59:31 PM »

Out of the bunch of mags I have here, I found one way off tolerance. If you look closely, you can see the wide variance in the wheel's pellet slots. Some slots required me to poke the pellets in before they would let the cover close. It also had enough offset to the clear cover that it fit tightly in the mag slot. Only takes a couple mins to sweeten them up.

I used a rat tail file (fine) to open the pellet slots, and then laid a piece of 240 grit sand paper on a hard surface, and scrubbed the bottom of the assembled mag on it until everything was even.

Slick as snot, now.

RMM · « **Reply #365 on:** May 24, 2014, 05:58:37 PM »

Quote from: stalwart on May 24, 2014, 03:59:31 PM

Out of the bunch of mags I have here, I found one way off tolerance. If you look closely, you can see the wide variance in the wheel's pellet slots. Some slots required me to poke the pellets in before they would let the cover close. It also had enough offset to the clear cover that it fit tightly in the mag slot. Only takes a couple mins to sweeten them up.

I used a rat tail file (fine) to open the pellet slots, and then laid a piece of 240 grit sand paper on a hard surface, and scrubbed the bottom of the assembled mag on it until everything was even.

Slick as snot, now.

A nice catch and thanks for sharing.

stalwart · « **Reply #366 on:** May 24, 2014, 06:59:36 PM »

My pleasure, Mike. As you know, I like my stuff to fit nicely... I enjoy activating stuff, and hearing a little, precise "click". The repeaters are cut to fit a pretty large variety of mag "sizes" without slop, and this one stuffed in the slot OK... but scrubbing it even makes it click like the rest.

By no means do I find fault with Crosman on this. These mags are a heck of a deal, and found everywhere. If 10% need a little sweetening to meet my standards... I'm all in!

rsterne · « **Reply #367 on:** May 24, 2014, 07:26:50 PM »

Ran into a .25 cal mag the other day that I couldn't get to work, it would stick and not index properly... I had it apart, reset the spring, even increased the tension, sanded the back of the wheel, fiddled with the tension on the screw.... no go, nada.... Finally found out that the brass pin was pressed in a fraction too far (ie below flush on the outside of the clear plate) and binding on the wheel.... Pushed it back a bit, then set it flush with the outside of the clear cover and no more problems....

Bob

stalwart · « **Reply #368 on:** May 25, 2014, 03:16:56 PM »

Thanks, Bob!

I haven't run into that yet... but, I'm going to eventually. Good eye!

stalwart · « **Reply #369 on:** May 25, 2014, 05:41:54 PM »

Added a long tube with the threads fitted to the receiver (oversize), and a barrel band precisely reamed to fit it.

I had a weird idea for the shroud... to give me some more volume, without offsetting it into the sight plane too much, I'm hunting some oval tube.

I'm not sure it's going to be worth the work, but homework is cheap, right? If it works, it will be... um... distinctive?

stalwart · « **Reply #370 on:** June 02, 2014, 03:18:46 AM »

Are there any .177 pellets that don't fit in an MRod mag?

moorepower · « **Reply #371 on:** June 03, 2014, 04:18:26 PM »

t would be a Polymag, if any would not. I only have .22 M-Rod mags, sorry.

StevenG · « **Reply #372 on:** June 03, 2014, 04:55:12 PM »

Oval tube sounds like an awesome idea. Will that let it be shrouded without a riser?

stalwart · « **Reply #373 on:** June 03, 2014, 05:30:34 PM »

Thanks, Pat. There is .350" of room, I'll get some and see what happens.

I'm sorta hoping for an excuse to come up with a PRod .177 mag... they look so good and clean in a 60... like it was made for them.

Steve, yup. The tubing is on it's way, and it is the perfect size to lay in even with the top of the receiver. If I turn the barrels for it (tight fit), there will be 2 separate chambers that can be tuned to disagree (exhaust at different times).

I'm taking a decidedly low tech approach to all this... I spent decades hurrying up low pressure air (22psi, max), and I plan to just do the opposite of all I learned there. I'll create just what an intake/exhaust specialist avoids at all costs: Aero confusion.

If nothing else, I'll learn something, and amuse the experts (again).

moorepower · « **Reply #374 on:** June 03, 2014, 05:51:31 PM »

I just measured 2 Polymags, and both were .345.

stalwart · « **Reply #375 on:** June 03, 2014, 08:04:41 PM »

Thanks!

If these will rotate properly, it looks like anyone wanting an 8 shot .177 will have to just leave a couple slots empty.

stalwart · « **Reply #376 on:** June 04, 2014, 07:48:06 AM »

G shaped slot locks bolt back easily, without making operation clumsy.

StevenG · « **Reply #377 on:** June 04, 2014, 12:12:18 PM »

That last thing looks awesome.

Possibly stupid question follows, can you machine the OD of a barrel without changing the ID? I read somewhere here that since airgun barrels are not stress relieved machining the OD would change the ID. I am only asking because I am up in the air about the repeater thing, neat idea but not sure I want it that much, on the other hand a full length oval shroud that works is a "I'm throwing money at my screen, but nothing is happening." situation.

stalwart · « **Reply #378 on:** June 04, 2014, 04:46:57 PM »

No. Depending on how the barrel is made, you will get changes to the ID to some degree. The initial size of the bore will determine if that is a problem (or a blessing). I have not come across a loose 60 bore yet, so I haven't seen any ill effect.

Not a stupid question... try again?

stalwart · « **Reply #379 on:** June 05, 2014, 12:35:42 AM »

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XS60C PCP Repeater project

Author Topic: XS60C PCP Repeater project (Read 455946 times))