Author Topic: P17 – five simple mods (Read 16750 times))

Tom Tucker · « **Reply #40 on:** January 10, 2020, 09:11:18 PM »

Gary, I definitely recommended removing the RH grip and lightly sanding the edges where the 2 grips meet. I use either 1000 or 1500 grit wet/dry. It's takes all the scratchiness away and it's not noticeable at all. I sand away a lot of the other casting flash that way also.

WyoMan · « **Reply #41 on:** January 10, 2020, 09:18:55 PM »

Thanks, Tom. I'm going to do that the next time the .177 cal is open and hit the .22 cal (work-in-progress) right now... they're both not so good.

Wyo

Yarddog · « **Reply #42 on:** January 10, 2020, 11:04:48 PM »

Quote from: Tom Tucker on January 10, 2020, 09:11:18 PM

Gary, I definitely recommended removing the RH grip and lightly sanding the edges where the 2 grips meet. I use either 1000 or 1500 grit wet/dry. It's takes all the scratchiness away and it's not noticeable at all. I sand away a lot of the other casting flash that way also.

Great idea, but I might add that you should probably use a sanding block, just to ensure a straight edge. 3M makes an excellent block. I have spent many thousands of hours pushing them to and fro on automobile bodies!

avator · « **Reply #43 on:** January 10, 2020, 11:07:13 PM »

I just found the grip slippery. The inner tube slip on resolves this.
This was not originally my idea. I kinda stole it from someone here.
I just found it to work really well.
I think I also read somewhere that a Glock style slip on fits as well.

sobdiver · « **Reply #44 on:** January 10, 2020, 11:35:18 PM »

Quote from: avator on January 10, 2020, 11:07:13 PM

I just found the grip slippery. The inner tube slip on resolves this.
This was not originally my idea. I kinda stole it from someone here.
I just found it to work really well.
I think I also read somewhere that a Glock style slip on fits as well.

I have a Pachmayr Grip Glove CZ 75/85 on one of my Crosman's. I just tried it on the P17, feels great!

WyoMan · « **Reply #45 on:** January 10, 2020, 11:58:52 PM »

That looks terrific, Rick. And I'm going to bet that it has a nice feel like you said.
What we'll do for a 30 dollar gun, lol... oh wait... it was $7.50.

Thanks-

Wyo

archellas · « **Reply #46 on:** January 11, 2020, 01:49:56 AM »

Very nice detail work Gary!
Following!
I was just gifted a P17 (Thank you Phil) so very interesting thread.

Xraycer · « **Reply #47 on:** January 11, 2020, 08:43:12 AM »

Quote from: WyoMan on January 10, 2020, 11:58:52 PM

What we'll do for a 30 dollar gun, lol... oh wait... it was $7.50. Thanks-

Haha
I was thinking the same thing when I saw the grip cover. I'm betting that the grip cover cost just as much as the $7.50 pistol.

Wait! Now that I think about it, Amazon is brilliant! Sell a well known good shooter, at a loss, but it has been calculated to make up for the loss, and gain profit via accessory purchases. It's the whole printer, ink market model.

avator · « **Reply #48 on:** January 11, 2020, 11:39:21 AM »

Quote from: Xraycer on January 11, 2020, 08:43:12 AM

Quote from: WyoMan on January 10, 2020, 11:58:52 PM

What we'll do for a 30 dollar gun, lol... oh wait... it was $7.50. Thanks-

Haha
I was thinking the same thing when I saw the grip cover. I'm betting that the grip cover cost just as much as the $7.50 pistol.

Wait! Now that I think about it, Amazon is brilliant! Sell a well known good shooter, at a loss, but it has been calculated to make up for the loss, and gain profit via accessory purchases. It's the whole printer, ink market model.

Enter the inner tube cross section...

What? Maybe a $2.99 inner tube at Walmart? .... and it will provide slip ons for all of those 16 guns some of you bought in this $7.99 deal.

Xraycer · « **Reply #49 on:** January 11, 2020, 11:45:48 AM »

Quote from: avator on January 11, 2020, 11:39:21 AM

Quote from: Xraycer on January 11, 2020, 08:43:12 AM
Quote from: WyoMan on January 10, 2020, 11:58:52 PM

What we'll do for a 30 dollar gun, lol... oh wait... it was $7.50. Thanks-

Haha
I was thinking the same thing when I saw the grip cover. I'm betting that the grip cover cost just as much as the $7.50 pistol.

Wait! Now that I think about it, Amazon is brilliant! Sell a well known good shooter, at a loss, but it has been calculated to make up for the loss, and gain profit via accessory purchases. It's the whole printer, ink market model.
Enter the inner tube cross section...
What? Maybe a $2.99 inner tube at Walmart? .... and it will provide slip ons for all of those 16 guns some of you bought in this $7.99 deal.

Nope, still too much money. You need to wait until you come across a free bicycle left curbside.

WyoMan · « **Reply #50 on:** January 11, 2020, 11:24:55 PM »

Got a spare inner tube that leaked and was filled with slime... hmmm... I'll probably go to Walmart for the $2.99 special. It still leaks btw, lol.

I may have gone beyond the inner tube and grip cover a bit... new barrel (.22 cal) that was cut from a $115 LW blank, and a few hrs machining. Shown with the oem barrel and a fake brake:

It fits! Now I'm going to cold blue the barrel and patiently wait for the other stuff I still "need"

Wyo

WyoMan · « **Reply #51 on:** January 12, 2020, 10:05:02 PM »

More progress on the .22 cal conversion...

The cold bluing didn't turn out great but I guess it's o.k. for what it is... looks better when the room is dark, lol

This .22 barrel has an o.d. of .480" so some bigger cuts had to be made to the frame...
Muzzle drilled to .484 (31/64"):

Clearance cut was larger too (shown with the .177 for comparison):

Everything else was done the same...

Now I need to find out how fast (or slow) this thing shoots.

Wyo

dv8eod · « **Reply #52 on:** January 12, 2020, 10:18:10 PM »

Gary, you should go ahead and start building a museum for all your guns. It can be a pilgrimage destination for all of us in awe of your skill. 😁 Maybe go one step further and make a virtual tour for it for those of us gps-ly challenged.

WyoMan · « **Reply #53 on:** January 14, 2020, 10:25:45 PM »

Thanks, Terry. I have about 32 pistols that survived the various operations over the years and still live today… but had a few that didn’t make it, lol

Found some time to chrony the .22 cal conversion today (when I wasn’t shoveling snow):
jsb 13.73 gr @ 359 fps for 3.9 fpe with an E.S. of 4 fps

So the longer .22 cal barrel, with 80% more barrel volume, is only shooting with 20% more fpe… I’m reaching diminishing returns pretty fast here. At 10m range it punches a pretty decent hole so I’m o.k. with it for now… accuracy tests are still pending.

I guess I did make one minor internal change (to the piston). Not sure if it mattered but the channel was cut in a trapezoidal shape instead of rectangular:

Thanks-

Wyo

WobblyHand · « **Reply #54 on:** January 15, 2020, 05:48:09 PM »

Using your recipe Gary, my P22, using a 1322 Crosman barrel, with JSB 13.4 gr Diablo Exact is running 373 FPS average, with ES of 4.6 FPS, or 1.2%. 4.15 FPE. For giggles I tried some 15.9 gr JSB's, they slow down to 346 fps average, with 4.23 FPE. There is more kick when I shoot the 15.9's.

Had to hand file the slot in the JB Weld. I didn't bottom the notch down to the aluminum, since the cheap needle files don't have very good teeth on the narrow sides. The file is 0.050 wide, which is close to the hole size. For my P17/22, the JB Weld is 0.025" thick, as the headspace measured 0.027". I left a few thousandths for the cyanoacrylate. Haven't gotten to sealing it yet. I may get a couple of more fps, as I know this o-ring has a nick in it. Planning on sealing the JB Weld and replacing the o-ring soon.

When you cold blue, how do you clean the barrel exterior? Is alcohol sufficient? I need to touch up my barrel, have slight 4 jaw marks on it.

Where do you find LW 22 barrels? Haven't seen many of them lately. My Crosman barrel was a practice run.

WyoMan · « **Reply #55 on:** January 15, 2020, 10:01:07 PM »

Nice numbers - that turned out well, Bruce.
I started doing these mods with my first P17 (about 7 years ago) because of the anemic performance in the thin air. But none of these mods were my ideas.
What's nice is when you put them all together they make a real difference... enough to make the .20 cal (i.e. Superchikn's work) and the .22 cal a viable option in this platform... again nice job!

I used rubbing alcohol to clean the barrel but I'm no expert... this was my entire procedure:
https://www.gatewaytoairguns.org/GTA/index.php?PHPSESSID=e954948fe94de2ab9cf24294ace04a00&topic=156933.0

I got this LW barrel blank from the Lothar Walther website:
https://www.lothar-walther.com/

Perhaps you can get them now from Crosman if you have a custom shop gun??? That would be faster and less expensive but I don't have a custom shop gun so I'm not sure. Thanks-

Wyo

WobblyHand · « **Reply #56 on:** January 15, 2020, 11:01:26 PM »

Thanks. Appreciate it. First time on a lathe. You wouldn't believe all the mistakes I made. Fortunately, all the mistakes were recoverable. All I can say is I've put in a lot more labor than the purchase cost! Of course, it's hard to beat $7.50.

Oh, boy, that barrel blue turned out beautiful! Seriously, its stunning. I'll have to try the Ospho blue. Never had much luck with other bluing.

LW isn't giving away those barrels. Ouch. Do they sell shorter barrels than 23"? Didn't see any in the airgun category.

Don't have a CCS gun, myself. Also really don't want a flat spot on top of the barrel, since there's no intent to put on a front sight. On the other hand, a ~$50 option, is better than $115.

Rick67 · « **Reply #57 on:** January 16, 2020, 11:45:41 PM »

Crosman no longer sells special CCS items even of you have a CCS gun.

Tried it this morning, a trigger shoe among other items, and was turned down.

Probably it depends on who is answering the phone, lol!

Called them to get the prices of 1720T parts.

The pellet tray for it is very expensive at $17

moorepower · « **Reply #58 on:** March 07, 2020, 11:42:04 AM »

I really need one of these P17's ! not worthy, about Crosman CS guns. That's why I bought one!

DevilsLuck · « **Reply #59 on:** March 07, 2020, 01:03:46 PM »

Bookmarking for future tinkering purposes.

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P17 – five simple mods

Author Topic: P17 – five simple mods (Read 16750 times))