Observation from a newbie

[Nordic Norm]

I switched completely from firearms to airguns in 2022. I have obeserved this. If shooting a pcp at low to medium power a regulator is helpful. If shooting high power an adjustable air valve is helpful. At high power a regulator is not helpful unless adjustable, but not necessary. Air valve power adjustment is most useful when changing pellet weight or shooting bullets. The entire range of air valve power adjustment is covering the entire range of possible projectile weight. Within a projectile weight sweet zone the air valve adjustment uses approximately 30% of it's adjustment range. What?

 

[Motorhead]

Within a projectile weight sweet zone the air valve adjustment uses approximately 30% of it's adjustment range. What?

That's a statement garnered from where ?

 

[Trucker3573]

I think you are referring to an adjustable transfer port vs a regulator ? I agree adjustable TP’s are a great tool and I wish more guns had them. I have not found a circumstance that a regulator isn’t helpful. It extends the number of useable shots greatly from your air supply and keeps fps very stable which is good for accuracy. Adjustable regs are great as long as you can change the hammer spring pre load with them. A necessary tool when taking reg pressures up and down. Adjustable regs aren’t completely necessary, the user just has to realize the power window for optimal performance of the gun is going to be much smaller.

 

[Nordic Norm]

That's a statement garnered from where ?

Experience and personal observation

 

[Nordic Norm]

I think you are referring to an adjustable transfer port vs a regulator ? I agree adjustable TP’s are a great tool and I wish more guns had them. I have not found a circumstance that a regulator isn’t helpful. It extends the number of useable shots greatly from your air supply and keeps fps very stable which is good for accuracy. Adjustable regs are great as long as you can change the hammer spring pre load with them. A necessary tool when taking reg pressures up and down. Adjustable regs aren’t completely necessary, the user just has to realize the power window for optimal performance of the gun is going to be much smaller.

Regulators are not necessary when shooting/hunting at max power, as regulator would be set to tank pressure. That is why a regulator is good for reduced power. Most non regulated high power guns don't work well set to med and low power. Most max power guns don't have regulators.
Yes, tranfer port adjustment or air valve adjustment is probably the same thing, or accomplishs the same mission.

 

[Trucker3573]

Regulators are not necessary when shooting/hunting at max power, as regulator would be set to tank pressure. Yes, tranfer port adjustment or air valve adjustment is probably the same thing.

What you said is true all depends on the situation and how many shots you need. For example if I were going to buy a big bore for deer I wouldn’t worry about a reg at all. I’m only needing 1-2 high power shots. For just about anything else I love regulated guns personally.

 

[Nordic Norm]

What you said is true all depends on the situation and how many shots you need. For example if I were going to buy a big bore for deer I wouldn’t worry about a reg at all. I’m only needing 1-2 high power shots. For just about anything else I love regulated guns personally.

Same here when shooting 800fps or less. When shooting 900fps+ in .25 a regulator wouldn't help much, example, my Seneca Eagle Claw.

 

[Motorhead]

No general statements fit all situations or guns .... SO MUCH to learn on the dynamics of valving, hammer weights or hammerless, plenum volumes and regulation applications or practical limits.

Do have fun .. quite the deep rabbit hole it is

 

[Trucker3573]

Same here when shooting 800fps or less. When shooting 900fps+ in .25 a regulator wouldn't help much, example, my Seneca Eagle Claw.

Fx Maverick 25 will push heavy lead to 900 fps + very consistently for many shots depending on bottle size and barrel length

 

[Nordic Norm]

Fx Maverick 25 will push heavy lead to 900 fps + very consistently for many shots depending on bottle size and barrel length

No general statements fit all situations or guns .... SO MUCH to learn on the dynamics of valving, hammer weights or hammerless, plenum volumes and regulation applications or practical limits.

Do have fun .. quite the deep rabbit hole it is

More dimensions then powder guns. This is what I am finding so fascinating about air.

 

[Nordic Norm]

Fx Maverick 25 will push heavy lead to 900 fps + very consistently for many shots depending on bottle size and barrel length

Nice gun, top shelf, 4x the price of my Eagle Claw

 

[Dr. Kralenstein]

i think Conner Holifield might hsave something to say about all this !

Who?

 

[vmaxpro]

Just depends on what ya want!
275fpe with a huma reg for 9 shots. You can still make decent power with a reg. Heres a uragan with reg and transferport adjuster. 45fpe-120fpe using the port adjuster only.

 

[Motorhead]

LOL ... valving and transfer size given a correct hammer weight is SIMILAR to powders burn rate, case capacity & how hot a primer used
What the under lying biggest issue is that we're working with generally 4,500 PSI or less as a MAXIMUM and not 25,000 to 55,000 cup pressure typical to burning nitrocellulose gun powders.
We can't achieve supersonic projectile speeds muzzle to target at these pressures and thus must stay sub sonic / trans-sonic to stay away from shock wave disruptions in trying to do so ... many have been there & tried .. so a ballistic brick wall.

Just a few snippets of reality entering the air gun universe

 

[Nordic Norm]

Just depends on what ya want!
275fpe with a huma reg for 9 shots. You can still make decent power with a reg. Heres a uragan with reg and transferport adjuster. 45fpe-120fpe using the port adjuster only.

View attachment 364889

View attachment 364894

View attachment 364895

Did you modify the Uragen? Must be a 30cal. Uragen spec says up to 80fpe. The other gun must be a 9mm, my Bulldog has similar power

 

[Nordic Norm]

LOL ... valving and transfer size given a correct hammer weight is SIMILAR to powders burn rate, case capacity & how hot a primer used
What the under lying biggest issue is that we're working with generally 4,500 PSI or less as a MAXIMUM and not 25,000 to 55,000 cup pressure typical to burning nitrocellulose gun powders.
We can't achieve supersonic projectile speeds muzzle to target at these pressures and thus must stay sub sonic / trans-sonic to stay away from shock wave disruptions in trying to do so ... many have been there & tried .. so a ballistic brick wall.

Just a few snippets of reality entering the air gun universe

Yes there are comparisons to be made. Powder guns do not have the delicate balance of components and adjustments. Powder guns have enormous levels of pressure, >20,000psi for .22lr. Compared to <4500psi available for airgun operation. The air power engineering is more complex and fussy especially with the semiautos. The .22lrs I used to shoot where most accurate with sub sonic standard velocity ammo. Trouble with anything below 1500fps with powder usually puts the deceleration shock wave within target range, 1200fps is even worse, plus it's loud. I am finding air more intricate and interesting. No need for that idiot emoji

 

[Stubbers]

"Within a projectile weight sweet zone the air valve adjustment uses approximately 30% of it's adjustment range"

Not sure I follow, I think this is too generalized of a statement.

 

[Nordic Norm]

Just depends on what ya want!
275fpe with a huma reg for 9 shots. You can still make decent power with a reg. Heres a uragan with reg and transferport adjuster. 45fpe-120fpe using the port adjuster only.

View attachment 364889

View attachment 364894

View attachment 364895

The 1st gun must be a 9mm. Similar power to my Benjamin Bulldog

 

[Nordic Norm]

"Within a projectile weight sweet zone the air valve adjustment uses approximately 30% of it's adjustment range"

Not sure I follow, I think this is too generalized

Ajustable power guns have a range of adjustment that exceeds the efficient possibilities for a given projectile weight. Example, a lightweight pellet will increase in velocity from a min power setting to aprox 30 to 50% of max settings, raising the power higher only wastes air and will not increase velocity significantly. A heavy bullet will increase velocity all the way to max setting with the below 50% being to slow to be effective. A midweight projectile will work best in the aprox 30 to 75% max power range, going to max will waste air unnecessarily. That range of efficiency per projectile weight is the effect adjustment zone for the projectile. This is especially noticeable on guns made to shoot bullets and pellets.

 

[Stubbers]

Ajustable power guns have a range of adjustment that exceeds the efficient possibilities for a given projectile weight. Example, a lightweight pellet will increase in velocity from a min power setting to aprox 30 to 50% of max settings, raising the power higher only wastes air and will not increase velocity significantly. A heavy bullet will increase velocity all the way to max setting with the below 50% being to slow to be effective. A midweight projectile will work best in the aprox 30 to 75% max power range, going to max will waste air unnecessarily. That range of efficiency per projectile weight is the effect adjustment zone for the projectile. This is especially noticeable on guns made to shoot bullets and pellets.

This doesn't apply to many valve types or specific conditions, just the ones you are familiar with currently, imo...