Umarex Walther Maximathor

"dr_beretta"Just got my Maximathor in 0.25 caliber in last evening and had a chance to get it cleaned and sighted in at 17 yards before it got too dark out. Looking at giving this gun a thorough review in the next several weeks. 



It looks nicer in your pics than it does in the marketing pics on the PA site. It might just be the silver scope. It's a good contrast. Now I'm thinking I should have ordered my scope in silver too...

How come you zero at 17 yards (instead of further)? I usually do at least 30 yards for a 25.
 
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So I had a chance to go shoot the gun again today after work. This time I zeroed the gun at 50 yards. I only zeroed to 17 yards last night due to being in my back yard. Today I had a chance to go drive to a local area where I could stretch its legs out.

--Accuracy at 50 yards is 1/2" 5-shot groups using Air Arms Field 25.4 grain pellets
--I saw no POI shift over 16 shots (2 magazines)
--2 magazines (16 shots) drops pressure from ~190 bar to ~120 bar
--It takes roughly 76 pumps to get back up to full charge using a Benjamin hand pump
--GUN IS LOUD when shot stock - the end of the barrel is threaded with 1/2 UNF male adapter
--gun is about as loud as a 0.25 caliber Marauder when shot with a Weihrauch LDC
--Build quality is superb for this price point - Minelli stock, blued metal, solid construction
--NOTE: the gun can be filled from either side of the fill port, but the silver part of the gun at the end of the cylinder does not spin to cover the fill port
--the gun is heavy at around 10 lbs with scope, but balances better and is more centered than on a Marauder which tends to be nose-heavy
--I'll have to chrony the gun once I have a chance to do so in the next few weeks but this is perfect for long range hunting for me

MORE TO COME LATER
 
Just to be clear - I don't have one of these rifles :)

Sounds like the air inlet valve is stuck (shut) that could be for a number of reasons but most likely it's just got 'seated' (owing to temp. changes / time etc.)

On one of these threads, (there are 2), someone describes how to remove the air bottle / tube - follow that and try giving the now exposed valve a couple of very light taps - it should be a spring-loaded mech. Use a very clean piece of wooden dowelling (or plastic - like a chop stick) to push against the central pin A BIT - don't go mad, just a little forward and backward opening ... may help.

For safety's sake NEVER attempt this on a bottle / tube with any stored air in it.