Skout Everything Skout EVO and Epoch

[Motorhead]

Always leave pressurized! Why do you think it makes a difference?

That is an ISSUE ..... It is a Known issue with polyurethane 0-rings that they can and will take a set ( As in if forced to take a slightly different shape they lack the shape memory ) when compared to Viton, Buna o-rings we typically see in PCP air guns.
So WHY are they using Poly o-rings .... tough question that many asked when these rifles first came to market. With SKOUT ( Smart Parts in Paintball ) the use of POLY in markers was a durability thing I was told by them & it has been carried over to there PCP development. Personally wish then had not as I've too seen flattened & deformed poly o-rings in my skout and well a few other manufactured PCP's .... yea there tough as nails but there shape memory not so much.

My take away in a PCP such as SKOUT that has such awesome engineered parts and pieces threw out the entire system bottle to regs to valve heavily using Poly rings on near every air control / sealing surface, The use of poly o-rings is GREAT in some locations but falls short of ideal in others ... Thus the "Why For" your seeing state of tune shifts as you have shared / stated. JMO

 

[Tricky-Dicky]

That is an ISSUE ..... It is a Known issue with polyurethane 0-rings that they can and will take a set ( As in if forced to take a slightly different shape they lack the shape memory ) when compared to Viton, Buna o-rings we typically see in PCP air guns.
So WHY are they using Poly o-rings .... tough question that many asked when these rifles first came to market. With SKOUT ( Smart Parts in Paintball ) the use of POLY in markers was a durability thing I was told by them & it has been carried over to there PCP development. Personally wish then had not as I've too seen flattened & deformed poly o-rings in my skout and well a few other manufactured PCP's .... yea there tough as nails but there shape memory not so much.

My take away in a PCP such as SKOUT that has such awesome engineered parts and pieces threw out the entire system bottle to regs to valve heavily using Poly rings on near every air control / sealing surface, The use of poly o-rings is GREAT in some locations but falls short of ideal in others ... Thus the "Why For" your seeing state of tune shifts as you have shared / stated. JMO

That would be a very good point if I hadn't already replaced the O rings in the HP reg with Viton, and I have a digital gauge on the HP side, so no creep.

 

[Motorhead]

You addressed ONE location .... as too all the other critical sealing joints that make up the complete operational system keeping it all balanced .... Nope

I'm not trying to be combative here.
This is WHY the rifles are provided with a Pressure On/Off valve at bottle ... Now if one chooses NOT TO use it as directed here you are with related issues.

 

[Tricky-Dicky]

Fair enough, but I still fail to see what else in the way of o ring compression/set would affect the velocity there is only the spool valve seals and if they were leaking pressure due to taking set surly this would affect all shots and make them all lower velocity like I said no change in the reg pressure to the spool valve plenum yet big change in velocity upwards when heavier pellet was used yet two weeks before both light and heavy where on point.

Also unless the gun is emptied /bled of air as well as turning off the bottle then It's still pressurised, does every Skout owner do this, and when I asked Skout about the need for turning off the bottle I was told only if left for a longer period of time than two weeks, it also begs the question of why don't Skout now recommend a different composition O ring for their guns?

 

[Motorhead]

Fair enough, but I still fail to see what else in the way of o ring compression/set would affect the velocity there is only the spool valve seals and if they were leaking pressure due to taking set surly this would affect all shots and make them all lower velocity like I said no change in the reg pressure to the spool valve plenum yet big change in velocity upwards when heavier pellet was used yet two weeks before both light and heavy where on point.

Also unless the gun is emptied /bled of air as well as turning off the bottle then It's still pressurised, does every Skout owner do this, and when I asked Skout about the need for turning off the bottle I was told only if left for a longer period of time than two weeks, it also begs the question of why don't Skout now recommend a different composition O ring for their guns?

Take it up with SKOUT .... I'm done trying to speak in a reasonable manor about stuff I have no fight in to be having.

 

[MSR Workshop]

Fair enough, but I still fail to see what else in the way of o ring compression/set would affect the velocity there is only the spool valve seals and if they were leaking pressure due to taking set surly this would affect all shots and make them all lower velocity like I said no change in the reg pressure to the spool valve plenum yet big change in velocity upwards when heavier pellet was used yet two weeks before both light and heavy where on point.

Also unless the gun is emptied /bled of air as well as turning off the bottle then It's still pressurised, does every Skout owner do this, and when I asked Skout about the need for turning off the bottle I was told only if left for a longer period of time than two weeks, it also begs the question of why don't Skout now recommend a different composition O ring for their guns?

I’ve seen some of their guns now come with harder O-rings, but I believe there’s still some of the same material. One place I have replaced a couple of rings as well is on the spool valve itself Just to see if it makes any difference at all...

Another area that I’ve replaced a ring at least twice, which is super super annoying is on the actual bottle itself. That small spring loaded pin there’s a polyurethane over on that. That gets a pretty bad set.. that little pin that opens the air has ridges on it.. so I depressurize my gun. The bottle will start to leak if that little earring isn’t perfect…. And that one’s a bit of a pain to get in and out to replace. That part though probably has nothing to do with velocity changes though.
now air slipping past one of the O-rings on the spool valve might.

 

[MSR Workshop]

Interestingly enough, I have a scout. Evo and an Epoch… with basically identical setups and regulators… both with identical modifications to the HP reg as well as both with O-ring upgrades and the Epoch shoots better than the EVO

have you even gone so far as to switch regulators, both high and low between guns as well as barrels and saw no difference so I think it has to do with the way the air path is laid out between the 2 guns.
the Epoch has a faster recovery between shots where as the Evo is a bit slower and I need to wait and watch the digital gauge to climb back to range…. About 50-75 psi between shots, so I don’t get a slight POI shift.…. don’t take much in .177 at 19yards.

My next tinker experiment is to take off the on off section where the bottle goes and see if there is any restriction there.….