Umarex .22 calibre 850 M2

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   Unit sent for inspection under warranty and nothing untoward identified. They returned it with sample 18 metre groupings in line with what I produce. With the warranty out of the way I will now do some work on lifting the 8ft/lb power output closer to 10ft/lb.
I have enjoyed many a summer evening plinking and getting very good results out to 28 yards with the reflex sight from standing position. Recently changed to JSB 13.73 grain wadcutters which appear to be performing well so i will also measure energy and group size at 20 and 25.

Umarex dressed up with Stealth Reflex sight which needed a dovetail to Picatinny adaptor. The extra height works well if I am walking about and making a relatively fast acquisition with the red dot. The M2 came with a cheek riser which also helps in this configuration.

The fitted Picatinny rail with Accu-Tech QD bipod. Not really better than a sandbag or fencepost but brings this in line with the .177 Hammerli.

Initial 13yard group after sight-in.
0.62 inch OD so falls short of its .177 companion.

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mercs Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 24 Apr 2020 Location: Stratford Status: Offline Posts: 272	Post Options Post Reply Quote mercs Report Post Thanks(0) Quote Reply Posted: 10 Mar 2024 at 10:48am
	Unit sent for inspection under warranty and nothing untoward identified. They returned it with sample 18 metre groupings in line with what I produce. With the warranty out of the way I will now do some work on lifting the 8ft/lb power output closer to 10ft/lb. I have enjoyed many a summer evening plinking and getting very good results out to 28 yards with the reflex sight from standing position. Recently changed to JSB 13.73 grain wadcutters which appear to be performing well so i will also measure energy and group size at 20 and 25. Umarex dressed up with Stealth Reflex sight which needed a dovetail to Picatinny adaptor. The extra height works well if I am walking about and making a relatively fast acquisition with the red dot. The M2 came with a cheek riser which also helps in this configuration. The fitted Picatinny rail with Accu-Tech QD bipod. Not really better than a sandbag or fencepost but brings this in line with the .177 Hammerli. Initial 13yard group after sight-in. 0.62 inch OD so falls short of its .177 companion.

Billbobnz Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 13 Jun 2020 Location: Ashburton Status: Offline Posts: 867	Post Options Post Reply Quote Billbobnz Report Post Thanks(0) Quote Reply Posted: 10 Mar 2024 at 10:51am
	Oooooo nice. I've always wanted to tinker with one of these.

Billbobnz Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 13 Jun 2020 Location: Ashburton Status: Offline Posts: 867	Post Options Post Reply Quote Billbobnz Report Post Thanks(0) Quote Reply Posted: 10 Mar 2024 at 10:52am
	They always look like they need an oversize suppressor on the front haha

Andy-A Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 18 Oct 2020 Location: Manakau Status: Offline Posts: 80	Post Options Post Reply Quote Andy-A Report Post Thanks(0) Quote Reply Posted: 10 Mar 2024 at 3:00pm
	I owned one of these a few years back, nice rifle. I like this guys YT vids, and and did the mod he suggested in the video, it did make a difference https://www.youtube.com/watch?v=0_yoiYmnuQA Sorry for the big pics, had a bit of a wrestling match to get them on..

Andy-A Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 18 Oct 2020 Location: Manakau Status: Offline Posts: 80	Post Options Post Reply Quote Andy-A Report Post Thanks(0) Quote Reply Posted: 10 Mar 2024 at 3:34pm
	I don't know if you've had it apart yet, but just passing on some info, from memory, don't pull the cocking leaver (I think) back too far, it has the smallest spring in the world, holding the smallest ball bearing in the world, which will launch itself into oblivion, given half the chance, I had to send off to UK for replacements and ended up using one of those food dome nets to capture it when refitting the bits :-)

mercs Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 24 Apr 2020 Location: Stratford Status: Offline Posts: 272	Post Options Post Reply Quote mercs Report Post Thanks(0) Quote Reply Posted: 10 Mar 2024 at 4:32pm
	i appreciate the advice and great pics, same mod done apart from blue plastic pen was sacrificed for spacer. Rifle, assembled and back out this afternoon, shot some nice targets and plinking out at 26 yards definitely hitting harder well worth the time. Nice one Andy.

Andy-A Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 18 Oct 2020 Location: Manakau Status: Offline Posts: 80	Post Options Post Reply Quote Andy-A Report Post Thanks(0) Quote Reply Posted: 10 Mar 2024 at 4:51pm
	Good to know ...

mercs Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 24 Apr 2020 Location: Stratford Status: Offline Posts: 272	Post Options Post Reply Quote mercs Report Post Thanks(0) Quote Reply Posted: 10 Mar 2024 at 7:55pm
	This was rather pleasing. 5mm spacer placed behind hammer spring. 11.5ft/lb Definitely improves options for pest control. 25 yards, warm and calm evening. Bench rest using shooting bag. .22 JSB Wadcutters, Stealth reflex sight, 150mm target Reticle dot and ring with horizontal and vertical lines which aligned perfectly with the target outside diameter. 5 shot Group OD <1"

Andy-A Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 18 Oct 2020 Location: Manakau Status: Offline Posts: 80	Post Options Post Reply Quote Andy-A Report Post Thanks(0) Quote Reply Posted: 10 Mar 2024 at 8:07pm
	A happy bunny , well perhaps not a bunny, they're in for it FYI I flicked you a message, re coms I had with Umarex techs in Germany Edited by Andy-A - 10 Mar 2024 at 8:10pm

mercs Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 24 Apr 2020 Location: Stratford Status: Offline Posts: 272	Post Options Post Reply Quote mercs Report Post Thanks(0) Quote Reply Posted: 04 May 2024 at 7:39pm
	As Billbobnz suggested needed a decent size suppressor like Andy-A's. I am also using the JSB Exact 14.3 grain which I note were in Andy-A's pictures. With the suppressor and bipod brings mine in-ine with the Empire kit sold in the UK. Newly arrived CO2 adaptor lets me use 2x12 gramme capsules when plinking at home. Adaptor can be removed pressurised, so I can make the rifle completely safe without venting CO2. Edited by mercs - 04 May 2024 at 8:31pm