Author Topic: CP1-M pistol first impressions (Read 41788 times))

rrdstarr · « **Reply #100 on:** May 24, 2017, 05:11:06 PM »

That was the original stock grip, shall do the same to my .177.

I will follow fairly closely what my Pardini K10 grips look like.

WhatUPSbox? · « **Reply #101 on:** May 24, 2017, 07:09:35 PM »

Thanks,
I also found some of the grip fitting articles on the USAS site from '09.
I was thinking of creating a wider/longer shelf by attaching to the underside..not adjustable but larger.
Starting to collect images of grips....That Pardini is nice

Wildcatter · « **Reply #102 on:** May 24, 2017, 07:30:29 PM »

Just ordered mine; does anyone have any experience with the 5.5 grain GTO's through the .177 version of the CP1-M?

WhatUPSbox? · « **Reply #103 on:** May 24, 2017, 08:18:19 PM »

Just got mine a few days ago as well, took a little over a week to get to CA.
Note it took a lot of force to break the bolt free. I was afraid I was going to bend the bolt handle.
Some oil and 50 shots later it is now much smoother but the first few were really rough.

Wildcatter · « **Reply #104 on:** May 24, 2017, 08:29:02 PM »

How do you like it?

WhatUPSbox? · « **Reply #105 on:** May 24, 2017, 09:01:21 PM »

Happy with it. I hope to use it to learn a little about target shooting. I'm sure I'll enjoy tinkering with the grip to get it more personalized. I'll stay with open sights for a while as I try to learn technique.
As was mentioned earlier, don't expect any shipping tracking info from Mrodair. It will just show up.

WhatUPSbox? · « **Reply #106 on:** May 25, 2017, 02:06:53 AM »

I made a start on a shelf. Had a piece of 2.5 x 3/4 inch oak. Cut down .4" deep to be roughly flush with the grip. Right now it is just a snug fit.

I'll shoot with this for a while to see if it helps. Since I have not used target grips before, comments on adjustments that I should try would be great...I still have a foot of the oak board left.

nervoustrigger · « **Reply #107 on:** May 25, 2017, 09:38:41 AM »

Not to change the subject but the comment about difficulty closing the bolt reminded me that my bolt had a sharp perimeter where it stepped up to the full diameter. The original O-ring in the barrel was chewed up as a result. I removed the burr and polished it, and it's easier to close the bolt now and the new O-ring has about 750 pellets through it and there is no blowby.

Just something to check when you have it apart.

WhatUPSbox? · « **Reply #108 on:** May 25, 2017, 12:12:14 PM »

Jason,
Thank you for the o-ring list earlier. I've yet to do a shot count/chrony run. This thread will be invaluable if mods are needed.

WhatUPSbox? · « **Reply #109 on:** May 25, 2017, 07:46:08 PM »

I thought I would add the chrony/shot count data from my .177 CP1-M. This is the second powerlet through the gun. Results look consistent with what others have posted in April.

Jason or others that did the double o-ring bumper mod, is that working well, consistent speed/shot count?

nervoustrigger · « **Reply #110 on:** May 26, 2017, 11:06:59 AM »

Quote from: WhatUPSbox? on May 25, 2017, 07:46:08 PM

Jason or others that did the double o-ring bumper mod, is that working well, consistent speed/shot count?

I've just been shooting it and enjoying it since the modification. I haven't run it across the chronograph again but the velocity seems stable because I still use the same POA to hit the spoon spinners at 25 yards.

Normally I do expect the initial tune of an O-ring buffer to drift slightly after some time and I attribute that to slight compression set of the O-rings caused by the hammer spring preload persistently pressing on them. With the CP1-M, there is virtually no preload and I think that's why it has not drifted.

rrdstarr · « **Reply #111 on:** May 28, 2017, 12:27:54 AM »

Quote from: WhatUPSbox? on May 25, 2017, 02:06:53 AM

I made a start on a shelf. Had a piece of 2.5 x 3/4 inch oak. Cut down .4" deep to be roughly flush with the grip. Right now it is just a snug fit.

I'll shoot with this for a while to see if it helps. Since I have not used target grips before, comments on adjustments that I should try would be great...I still have a foot of the oak board left.

I have Oak too, treads for the stairs, and now wonder if adding the "Platform" would better support my Mongo size hands?

WhatUPSbox? · « **Reply #112 on:** May 28, 2017, 12:39:58 AM »

I went back and made the cavity .05" deeper so that it engaged my hand better...That said, I'm still trying to figure out this one hand, broken wrist shooting hold so the shelf is one more variable

Bizill · « **Reply #113 on:** May 28, 2017, 01:57:12 AM »

Nevermind.

Earl · « **Reply #114 on:** May 28, 2017, 10:25:44 AM »

Is the Mrodair CP1-M as accurate as the Beeman P17?

WhatUPSbox? · « **Reply #115 on:** May 28, 2017, 03:36:25 PM »

I have both the P17 and the CP1 though both are new to me. In my hands they are comparable, though I expect with time and some grip optimization, I will do better with the CP1. Take a look at the 5m match gate results. There are a couple of people shooting CP1's very well.

Earl · « **Reply #116 on:** May 28, 2017, 04:21:37 PM »

Regarding the Mrodair CP1-M pistols for $89:
Do the front sights still need to be shimmed about 3/8 inch?
Does Mrodair sell the shim and longer screw?
Do the new ones come with the trigger set screw or just a threaded hole?
Does the muzzle brake reduce the noise?

WhatUPSbox? · « **Reply #117 on:** May 28, 2017, 05:05:04 PM »

I've been shooting at the 5 meter targets with a 6 o'clock hold and the sights are OK (though the rear sight is all the way down so a shim may be a good addition). 3/8" sounds like a lot.
I have not taken the trigger guard off to adjust that screw yet but it looks like it is in there.
I doubt the muzzle brake does too much, though in .177 the noise is not too bad. I think I'll add the o-ring buffer to the valve and that should reduce noise a bit more

WhatUPSbox? · « **Reply #118 on:** May 29, 2017, 12:53:23 AM »

So, to try to answer the accuracy question, I tried some shots with the CP1 held in a vise...first time I ever tried this.

Unfortunately the only place I could clamp the vise and still have some range is on a tool cart. It is heavy but can still move, especially when loading wadcutters.
Even with that, the results are pretty good and much better than I can hold.

These were 5 shots and 5 meters, Crosman wadcutters .177.

The down side to this is that I can't blame the CP1 for what shows up on the target...

WhatUPSbox? · « **Reply #119 on:** May 29, 2017, 03:09:31 PM »

Jason,
Do you have a source for the silicone 50 durometer -113 o-rings for the valve buffer mod? I could find silicone in 70 or Nitrile in 50 but not the silicone in 50

Thanks

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CP1-M pistol first impressions

Author Topic: CP1-M pistol first impressions (Read 41788 times))