.30 Evol Shootin’ for Fun

[Ezana4CE]

Took my .30 Evol out to 64-65 yards today for a leisurely shoot. Wind was 6 -10 mph. Shot from standing position behind a tripod. Had to determine my holdunders since adjusting my scope for 100 yard shooting. This was one of my dream guns and I’m having a blast familiarizing myself with her. I recorded a few mags trying to learn to better operate my scope cam as well.

For some reason I was having a time pulling my shots up between the eyes. Oh well. I’ll work on it another day. 


I’m curious, does anyone’s Evol get louder as the reservoir pressure approaches the regulator setting?

 

[Airgun-hobbyist]

Took my .30 Evol out to 64-65 yards today for a leisurely shoot. Wind was 6 -10 mph. Shot from standing position behind a tripod. Had to determine my holdunders since adjusting my scope for 100 yard shooting. This was one of my dream guns and I’m having a blast familiarizing myself with her. I recorded a few mags trying to learn to better operate my scope cam as well.

For some reason I was having a time pulling my shots up between the eyes. Oh well. I’ll work on it another day. 


I’m curious, does anyone’s Evol get louder as the reservoir pressure approaches the regulator setting?

Yes, I did notice that yesterday and wondered about it as well. It got louder as the power and speeds fell down to well below regulator pressure. It probably has to do with the weight of the projectile as well as the valve operation. 

(Edit to add):. I just realized why it got louder... From what I have read, the moderator internal baffle was designed by Silent Thunder Ordinance specifically for the AAA Evol. Accordingly, because STO's air stripping and moderation devices are caliber and air pressure/volume specific, when the volume of air was significantly reduced the sound levels went up.

I intentionally dropped below regulator pressure to get the FPS to as low as it would be at 100 yards to test long range penetration and slug expansion in gel.

 

[Ezana4CE]

@airgun-hobbyist That’s good to know. Do you intend to post your 100 yard test results?

 

[Airgun-hobbyist]

@airgun-hobbyist That’s good to know. Do you intend to post your 100 yard test results?

Yes, a detailed post in the projectile's section, and since it was with the Evol 30 I will share it here as well. These are lubed Varmint Knocker slugs in .30 caliber, 50 grains shot into Clear Ballistics 20% gel block. 

Results from left to right: 

875 FPS, 0.375" expansion, 7.5" penetration

750 FPS, 0.300" expansion, 7" penetration

725 FPS, 0.275" expansion, 6.5" penetration

Not shown is a JSB 50 grain pellet that got 875 FP, 0.000" expansion, 8.5" penetration.

 

[Ezana4CE]

@Airgun-Hobbyist The first slug expanded pretty well. That would probably leave a nasty mangled wound channel if it fragments after breaking through bone. Thank you for sharing your results. I will be on the lookout for your post and replies to it.

 

[Ezana4CE]

Took old Evolyn out today for a little while for the first time in months. Shot from 50 yards standing behind a tripod in 3-16 mph wind gusts. Shooting JSB .30, 43.75 grain diabolo pellets eight-shot groups. Nothing to brag about, just took her out on a whim because it was pretty windy today

 

[JaceSpace1369]

Yes, a detailed post in the projectile's section, and since it was with the Evol 30 I will share it here as well. These are lubed Varmint Knocker slugs in .30 caliber, 50 grains shot into Clear Ballistics 20% gel block.

Results from left to right:

875 FPS, 0.375" expansion, 7.5" penetration

750 FPS, 0.300" expansion, 7" penetration

725 FPS, 0.275" expansion, 6.5" penetration

Not shown is a JSB 50 grain pellet that got 875 FP, 0.000" expansion, 8.5" penetration.

View attachment 194420

How did a 30 caliber slug? Expand to a .275 diameter?

 

[Airgun-hobbyist]

How did a 30 caliber slug? Expand to a .275 diameter?

See the hollow point's expansion? It opened up to .275" when it went into the gel at 725 fps.

 

[JaceSpace1369]

See the hollow point's expansion? It opened up to .275" when it went into the gel at 725 fps.

View attachment 397308View attachment 397309

View attachment 397305

View attachment 397306

Gotcha, I didn't understand initially that you are going off of the tip's expansion, not the overall expansion, thanks for clarifying.

 

[airprsr]

Yes, I did notice that yesterday and wondered about it as well. It got louder as the power and speeds fell down to well below regulator pressure. It probably has to do with the weight of the projectile as well as the valve operation.

(Edit to add):. I just realized why it got louder... From what I have read, the moderator internal baffle was designed by Silent Thunder Ordinance specifically for the AAA Evol. Accordingly, because STO's air stripping and moderation devices are caliber and air pressure/volume specific, when the volume of air was significantly reduced the sound levels went up.

I intentionally dropped below regulator pressure to get the FPS to as low as it would be at 100 yards to test long range penetration and slug expansion in gel.

I think the reason it’s louder once off the reg is because the lower pressure behind the valve is allowing the hammer spring to overpower the vale, thus the valve is staying open too long causing it to burp air.

 

[Airgun-hobbyist]

I think the reason it’s louder once off the reg is because the lower pressure behind the valve is allowing the hammer spring to overpower the vale, thus the valve is staying open too long causing it to burp air.

This could be the case, as the reg pressure and hammer spring tension are running pretty high right now to get high power out of the system versus wanting air sipping shot count. The new system Tom developed will let me tune it down to air sipping levels but still remain at this pfe.