Sniper II Pressure - Low vs High ???

[The_Joker]

I've searched this and other forums but can't find detailed rationale for the choice of one over the other.

I have noticed that some people prefer to run their Sniper II on Low Pressure/High Volume going into their marker while others prefer the opposite, High Pressure/Low Volume.

I ask this in anticipation of getting a Belsales Evolution-X cocker which will come to me as a pump. More than likely, it will have the most current internal parts but an older right-hand feed body. Plans are to have an AKA 2 Liter or 2 Liter Plus Regulator depending on research.

I'm almost fanatical about my accuracy and have been like this with not only my firearms but paintball markers. Tight paint-to-barrel match is a given and non-issue because I size each of my balls to the barrel. Yeah... I'm a social zero with too much time on my hands.

I realize there is a strong relationship between consistency in velocity and accuracy which leads me to this question.

For a Sniper II, what is the best set-up for consistant velocity/accuracy:
Low Pressure/High Volume or
High Pressure/Low Volume ???

.... and more importantly, what's your rationale for your choice??.... are there any data to support your rationale???... are there other considerations I'm missing???

Thanks so much in advance for your help as I learn these principles.

[raptor]

A while ago Thumper posted a very good article about this topic, may want to look at it .

[Grendel]

Joker I just responded to this on MCB and said you need to PM Thumper on MCB or here he's the residient Evolution Sniper expert.

My post on MCB:

If you are using a 2K+ cocker in any form [Belsales Evolution-X] like your as a start the valves and the valve chamber in them are already better suited for use as a LP Sniper. So unless you want to go through re-valving, re-springing, and devolumizing you are better off shooting for a LP setup though it does not have to be really low.

For a Sniper there is really only one major advantage for a LP Sniper and that is sound signature. Essentially LP Snipers and quieter then HP Snipers. There are some disadvantages to running LP [especially sub-250psi] and the main one is efficiency. The low and especially super low pressure setups can really turn you sniper into a gas hog. You can change these to HP guns but IMHO not worth the effort unless you are going 12g.

Depending on the valve you have and spring setup I tend to set my 2K+ snipers for a range between 275 psi to 375 psi. This seems to be a good compromise range for getting a quiet gun, with good consistancy, reasonable efficiency and no farting. If you really want the low down on setting up a Belsales Evolution-X PM Thumper on here he has a lot of experience setting up Evolutions as Snipers and I'm sure he will be more than willing to help you out with some "tricks" specific to the Evolutions stock hardware.

Here is a link to Thumpers Sniper Gallery where you'll see several Evolution Snipers he's set up:
TeamSection8 : Thumper's Sniper II Gallery

Maybe Thumper will speak up here.

[The_Joker]

Thanks Grendel.... I was hoping to hear from both you and Thumper.

I placed this on both MCB & here to get as much advice as possible.

If I'm understanding you correctly... the sound signature is the only reason for LP.... Both HP & LP yield the same consistency in velocity assuming you have sweet-spotted it appropriately for valves, main/valve spring????

I didn't want to muddy the waters further by asking about CO2 vs HPA but if there are any considerations, I'd be glad to hear them.

[Grendel]

Originally Posted by The_Joker

...If I'm understanding you correctly... the sound signature is the only reason for LP.... Both HP & LP yield the same consistency in velocity assuming you have sweet-spotted it appropriately for valves, main/valve spring????

Yes that is basically it consistancy essentially is determined by having the same volume of air at the same pressure form shot to shot [given you have a good paint to barrel match and are not shooting eggs ]. So once you get your reg set at a pressure that it is stable at and get the balance of springs set you should have pretty consistant shots. This is reguardless of pressure in the most part. There are some theorized differences in consistancy due to the difference in how much the balls deform when when shot when comparing HP vs. LP but this is a loaded argument right up there with is woodsball better than speedball arguement .

Originally Posted by The_Joker

...I didn't want to muddy the waters further by asking about CO2 vs HPA but if there are any considerations, I'd be glad to hear them...

For a sniper CO2 is fine because of the slow rate of fire and the use of a regulator. There is some argument for CO2 being actually better for shooting paintballs and Glenn and Craig Palmer will discuss this belief in high detail.

I would not buy a HPA rig solely for use on a pump but if you have one already it is already regulated and is not as subject to variations due to atmospheric differences. That being said I use HPA on my Snipers it does give you a little more consistancy and very easy to get recharged at scenarios and are great in cold weather where CO2 can give you some problems.

[The_Joker]

Originally Posted by Grendel

Yes that is basically it consistancy essentially is determined by having the same volume of air at the same pressure form shot to shot [given you have a good paint to barrel match and are not shooting eggs ]. So once you get your reg set at a pressure that it is stable at and get the balance of springs set you should have pretty consistant shots. This is reguardless of pressure in the most part. There are some theorized differences in consistancy due to the difference in how much the balls deform when when shot when comparing HP vs. LP but this is a loaded argument right up there with is woodsball better than speedball arguement .



For a sniper CO2 is fine because of the slow rate of fire and the use of a regulator. There is some argument for CO2 being actually better for shooting paintballs and Glenn and Craig Palmer will discuss this belief in high detail.

I would not buy a HPA rig solely for use on a pump but if you have one already it is already regulated and is not as subject to variations due to atmospheric differences. That being said I use HPA on my Snipers it does give you a little more consistancy and very easy to get recharged at scenarios and are great in cold weather where CO2 can give you some problems.

Thanks so much Grendel.... I hope to see (and talk) with you & Thumper if you come to PBChas for the Ardennes scenario.

[thumper]

I've messed with a few older stabs lately -- and they are easily +/- 4 fps on co2 on sniper's. I answered the LP vs HP stuff on mcb.

"People for a stress free main spring -- unite"

[The_Joker]

Originally Posted by thumper

I've messed with a few older stabs lately -- and they are easily +/- 4 fps on co2 on sniper's. I answered the LP vs HP stuff on mcb.

"People for a stress free main spring -- unite"

That was exactly what I was looking for... Thank you Thumper.

[-jtodd-]

low pressure is more quiet, but uses a high air volume and can be air hogs. So if you are planning on playing for long periods at a time when you cant air up again high pressure would probably be more favorable.

[thumper]

Originally Posted by -jtodd-

low pressure is more quiet, but uses a high air volume and can be air hogs. So if you are planning on playing for long periods at a time when you cant air up again high pressure would probably be more favorable.

agreed for very low pressure -- one of the reasons I try and hover in the 375psi range. all the benefits of LP w/o the waste.