Author Topic: SPA model M25 in .35 cal (Read 4904 times))

BSJ · « **Reply #20 on:** November 03, 2023, 06:25:39 PM »

Whoa!

anti-squirrel · « **Reply #21 on:** November 03, 2023, 06:43:35 PM »

Hatsan/H&N .35 pellets work quite well in my Sonja's M-25. I got really lucky in that slugs (and the swaging tool) for my ShinSung Ultra 9mm work exceptional in the M-25. I'll likely order some NSAs eventually.

We haven't shot much the last year excepting pumpers, but as soon as we move, I suspect I'll be digging into the M25 and seeing about improving efficiency. Accuracy is already there- at least enough for now.

I'll be following this thread closely, Jason!

nervoustrigger · « **Reply #22 on:** November 03, 2023, 10:48:17 PM »

Scott,

That barrel...

Peter,

Thanks for the heads up about the H&N pellets. I'll put them on the list to try.

nervoustrigger · « **Reply #23 on:** November 03, 2023, 10:59:06 PM »

Regarding the reservoir volume, it looks like mfg spec of 245cc (15ci) is probably a good figure based on an extrapolated calculation from the tube's exterior dimensions.

Looks like the plenum is another 90cc (5.5ci) or so.

Rob M · « **Reply #24 on:** November 03, 2023, 11:56:40 PM »

cant belive they can make a regged 9mm shipped from china for 263 dollars, unreal

mackeral5 · « **Reply #25 on:** November 04, 2023, 11:14:15 AM »

Quote from: nervoustrigger on November 03, 2023, 10:59:06 PM

Regarding the reservoir volume, it looks like mfg spec of 245cc (15ci) is probably a good figure based on an extrapolated calculation from the tube's exterior dimensions.

Looks like the plenum is another 90cc (5.5ci) or so.

Great thread, I look forward to following this one.

When I measured my P15's tube capacity, using water poured from a graduated cylinder, I found it to have considerably less capacity than advertised. The p15's cylinder's interior was dumbbell shaped, larger ends, with a gradual taper to a smaller ID center section.

While I have not handled the P25, from other pics it looks to have tube/plenum interfaces similar to the p15.

bear air · « **Reply #26 on:** November 04, 2023, 03:39:28 PM »

Thanks Jason I couldn't find words for that barrel. SMH. I got mine all set up with the bipod and scope today. I plan on cleaning the barrel and taking it out in a few.

nervoustrigger · « **Reply #27 on:** November 05, 2023, 12:43:18 AM »

Great Chris, good to hear you're getting on with testing. Let us know how it goes!

bear air · « **Reply #28 on:** November 05, 2023, 08:51:06 AM »

I didn't make it out yesterday. I did spend about three hours yesterday cleaning the barrel and trying to clean up the crown. It is by far the dirtiest barrel I have ever cleaned, I stopped keeping track of the patches after twenty five. Im not sure my shade tree crown work is going to be sufficient. I might need to remove the barrel and use the brass screw method I've seen others use to clean up a crown. I will keep you guys posted.

bear air · « **Reply #29 on:** November 05, 2023, 04:49:39 PM »

I made it out today to sight in the m25. It was very windy out. It was actually pushing me and the gun around. I think it might like the jsb pellets and slugs too. After having a 457&50 I don't think the m25 is all that loud. I ended up only using three baffles. Mine seems to be wasting a lot of air. Filled to 3650 and after one mag it was down to 2300 ish. I think I will really enjoy the journey/adventure I'm embarking on with the m25. Here is the picture of my final mag using fx pellets.

Rob M · « **Reply #30 on:** November 05, 2023, 05:05:37 PM »

Chris whats the distance on this target ?

bear air · « **Reply #31 on:** November 05, 2023, 08:09:06 PM »

Sorry, that's 50 yards. Like I said it wasn't easy shootin today. Twenty mph wind coming straightish behind me with what seemed like whipping back and forth gusts. I plan on working the leade and the crown some more. I noticed today it chambers the pellets with a good amount of resistance and it was even more with the slugs. I tested with jsb, fx pellets and fx hybrid slugs. I'm really looking forward to getting this gun up to snuff.

Rob M · « **Reply #32 on:** November 05, 2023, 08:15:21 PM »

thats pretty good for 50 in the wind.

bear air · « **Reply #33 on:** November 06, 2023, 08:00:45 AM »

Thank you. I felt like it was a great stopping point yesterday. Hopefully this week I can find some time to work on the barrel some more and give it another go.

anti-squirrel · « **Reply #34 on:** November 09, 2023, 07:39:00 PM »

Quote from: Rob M on November 03, 2023, 11:56:40 PM

cant belive they can make a regged 9mm shipped from china for 263 dollars, unreal

Best kept secret in airguns, IMO.

SPA has been making good airguns for a few years; my PP700 proved that to me. I have 3 other SPA airguns now- all PCPs- and they are all good values. The M-25 is a real tuner's delight. Eventually, I'll start working on mine but likely not for another year.

Keesbo · « **Reply #35 on:** November 10, 2023, 07:21:55 PM »

Hi

I also own a M25 in .35.
I also recrowned the barrel, I cant say that it made a big improvement. I noticed that shooting of a bag is better than using a bipod.
And I dont use any of the moderator. The problem is that then the aircilinder is longer then the barrel. So I cut something off the aircilinder.
Also the triggerguard is in the wrong position, I placed it further forewards so that your fingers actually have place on the pistolgrip wright.

But the most important thing!!! Mine regulator sets on 150Bar, I made a gauge on it. It produces 160 Joule with JSB Exact. Only 2M/s spread.
A lot of power and that is the problem for this platform. It is available from .177 to .35.
It is build to weak for the .35
The probe/bold is retained by only a M5 bolt. After a 200 shots I could not cock it anymore. That M5 bolt was curved by al the power it met stop. I made an extra retainer bolt from m5 12.9 quality.
So now the bold/probe is retained by 2 M5 bolt and now it is safe.
When the one M5 bolt snaps off, you will get the bold/probe wright in your face!

Keesbo · « **Reply #36 on:** November 10, 2023, 07:27:19 PM »

The M25 with a shortened aircilinder, modified triggerguard and some 50 meter groups of five shots with the JSB Exacts

Keesbo · « **Reply #37 on:** November 10, 2023, 07:34:38 PM »

I would like to place a link over here but I can not.

Keesbo · « **Reply #38 on:** November 10, 2023, 07:38:47 PM »

Some more pictures of 5 shot 50 meter groups and the regulator gauge

bear air · « **Reply #39 on:** November 11, 2023, 04:11:20 PM »

Great looking groups there. Once you get enough posts you will be able to create threads.Im going to work on the leade some more today so it chambers the projectiles a little smoother. I also want to work on the crown but haven't gotten the tools yet. Tomorrow Id like to take it out again and shoot it some more.