I thought the Zelos was light because Pyramyd Air erroneously says it weighs just six lbs but it actually weighs closer to seven. I need to get a lighter scope than the Aim Sports Alpha 6 4.5-27x50 I have on mine. That combined with the heavy-azz Huben Cricket Bottle Regulator and 580cc CF Bottle have pushed total weight to almost 11lbs.
I'm considering a Firewalker special with shortest barrel possible that would be custom fit just past two side by side tiny bottles , but I would never be able to sacrifice my barrel I have now as the accuracy of it it just amazing. I read somewhere that the competitive shooters never clean their barrels , and nothing has been down my Zelos barrel except Apolo slugs , and pellets. I was also informed by reading that the alloy compesition of different manufacturers is an important part of lubercation to the barrel , so I gathered hard alloys don't lube as well as softer ones , and I'm talking about the natural lubercation properties of lead. I don't know for sure , but I think Apolo uses a very soft alloy , and I read Zan's are rather hard , but don't know how accurate this statement is.
 
I'm considering a Firewalker special with shortest barrel possible that would be custom fit just past two side by side tiny bottles , but I would never be able to sacrifice my barrel I have now as the accuracy of it it just amazing. I read somewhere that the competitive shooters never clean their barrels , and nothing has been down my Zelos barrel except Apolo slugs , and pellets. I was also informed by reading that the alloy compesition of different manufacturers is an important part of lubercation to the barrel , so I gathered hard alloys don't lube as well as softer ones , and I'm talking about the natural lubercation properties of lead. I don't know for sure , but I think Apolo uses a very soft alloy , and I read Zan's are rather hard , but don't know how accurate this statement is.
I have a cheap Xisico Sentry 705HC .22 PCP Rifle that just loves the Daisy Precision Max Hollow Points. They are made from soft lead and I have shot 1000's of them through it with no degradation in accuracy. Haven't had the chance to shoot my Zelos yet - hoping it likes them too.
 
I have a cheap Xisico Sentry 705HC .22 PCP Rifle that just loves the Daisy Precision Max Hollow Points. They are made from soft lead and I have shot 1000's of them through it with no degradation in accuracy. Haven't had the chance to shoot my Zelos yet - hoping it likes them too.
The Zelos with it's adjustable regulator likes whatever you tune it to I was shooting Apolo 28 grain HP slugs with reg set at 2,700 , and hammer turned 4 in . I got a Chronograph now , so soon as I get my Zelos back together I will see how fast there going ?
 
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The Zelos with it's adjustable regulator likes whatever you tune it to I was shooting Apolo 28 grain HP slugs with reg set at 2,700 , and hammer turned 4 in . I got a Chronograph now , so soon as I get my Zelos back together I will see how fast there going ?
Have read that our Zelos are over-sprung and that adjustments with the stock hammer spring are not very effective. On the FB Umarex Zelos Owners Group, a guy name of Dave Goldfarb is reworking his .25 with lighter springs and a new valve. It is showing promise as to making the Zelos Hammer Spring much more responsive to adjustment and reducing valve noise/ping when firing.

Here's the link to the Group - https://www.facebook.com/groups/umarexzelosownersgroup/