This report covers:
- The test
- Seneca Hunting pellet
- Discharge sound
- H&N Baracuda Match with 4.50mm heads
- H&N Sniper Magnum
- Shot count
Wives — unplug the computer and hide your husband’s smart phone. Today is gonna hurt!
(song parody, sung to the tune of The Great Pretender)
Oh,oh-oh-oh-yohhhh — yes, I’m the Great Enabler.
I make you buy stuff you don’t need.
Your wife is right, I’m her greatest plight,
I’m really a very bad seed.
I make you buy stuff you don’t need.
Today we look at the velocity of the Air Venturi Avenge-X precharged pneumatic air rifle. And I did it all wrong. I did so because this rifle is so adaptable and tunable that no matter what I do, it won’t be what you want to see.
I’m not telling you to withhold your comments. I often get my best ideas from things you guys say. But there are also the guys who ask, “BB, could you shoot that test again while wearing Crocs and wearing your belt backwards?”
At the SHOT Show last January Tyler Patner told me this rifle gets an incredible number of shots on a fill. He said I could see 70 high-power shots on a single fill. If Tyler was just a salesman I would take that with a grain of salt. But he’s an airgunner. He knows what he’s talking about and he also knows I’m going to test it and tell you the truth. That makes him a dangerous man. You better listen when he speaks!
It took me a month to get to this point because I pondered what I should do. Should I shoot the rifle for accuracy first and then test velocity? Should I test just one pellet and adjust the hammer spring and the reg pressure?
What I decided to do was test three pellets — each at high and low power settings, and count the shots as I went. After every 20 shots (10 on high power and 10 on low) I would shoot the first pellet on high power again to see if the rifle was still on the power curve. It should become clear when you see the test results.
I tested three heavy pellets because, let’s face it — the Avenge-X is powerful! Lighweight pellets have no business here and need not apply. Let’s begin.
The rifle had been sitting for one month on a fill and was completely full at the start. And I must confess to a mistake I made. My rifle is configured as a .177. I have a .22 barrel to swap in, but today I’m testing a .177. I was confused about that in Parts 1 and 2, but when I went to load a pellet it became crystal clear.
Seneca Hunting pellet
The .177-caliber Seneca Hunting pellet is a 16.1-grain dome. The first ten on high power averaged 845 f.p.s. At that velocity the muzzle energy is 25.53 foot pounds. The low was 831 and the high was 853 — a difference of 22 f.p.s.
On low power 10 averaged a velocity of 764 f.p.s., for a muzzle energy of 20.87 foot-pounds. The low was 759 and the high was 771 — a difference of 12 f.p.s.
After the 20th shot, I turned the power back to high and shot a single Seneca Hunting pellet at 853 f.p.s.
I recorded the sound level of the second shot in the first string on high power. It was 98.2 decibels. It was quieter than I thought it would be at the rifle’s power level.
H&N Baracuda Match with 4.50mm heads
Next up were ten H&N Baracuda Match pellets. On high power they averaged 980 f.p.s., for a muzzle energy of 22.72 foot pounds. The low was 973 and the high was 1,000 f.p.s. for a spread of 27 f.p.s.
On low power the average velocity was 885 f.p.s., which is an energy of 18.53 foot pounds. The low was 883 and the high was 891 f.p.s. — a difference of 8 f.p.s.
After the 41st shot I turned the power up to high and shot a single Seneca Hunting pellet at 853 f.p.s.
H&N Sniper Magnum
The last pellet I tested was the obsolete 15-grain H&N Sniper Magnum. On high power ten averaged 870 f.p.s. which is good for a muzzle energy of 25.22 foot-pounds. The low was 864 and the high was 882 — a difference of 18 f.p.s.
On low power ten averaged 786 f.p.s. which produced 20.58 foot pounds. The low was 783 and the high was 793 f.p.s. a difference of 10 f.p.s.
After the 62nd shot I turned the power up to high and shot a single Seneca Hunting pellet at 833 f.p.s. This was a decrease in velocity from the average of the first string (846 f.p.s.) but it was still faster than the slowest shot in that string (831 f.p.s.) So we are still on the power curve.
I now switched back to the Seneca Hunting pellet for the final shots. Let’s look at the next couple strings with this pellet.
And so on. I kept shooting until the velocity of this pellet fell below 800 f.p.s. which it did on shot 93 (799).
The Air Venturi Avenge-X gets a LOT of shots! Now, I admit that I shot on both high and low power, so there will be fewer shots on high power alone, but how many shots do you need?
What I see in today’s test results is a possible sweet spot for the Seneca Hunting pellet at somewhere between 820 and 830 f.p.s. BUT — and this is an all-important but — is that the .177-caliber pellet I want to shoot in this rifle? I’m an old man and probably won’t live long enough to test all the possibilities this Avenge-X offers, so I’m not going to try. Instead I’m going to try to find an accurate pellet and see what sort of tune it likes — in .177. Remember, I’m still going to test this same rifle for you in .22-caliber.
Also I want to note that the power adjuster changed the power of the airgun RIGHT NOW. On many guns with power adjusters it takes several shots for the velocity to settle back down, but the Avenge-X I am testing changes immediately.
After the test I filled the Avenge-X, using the RovAir compressor. Like before I blew a burst disk at the end of the fill. But unlike before this time I read the pressure gauge on the rifle immediately after the fill. It read 4,750 psi! I think in the higher range the auto shutoff on the RovAir isn’t reading as high as it is filling. I know the small gauge on the Avenge-X is not that precise, but it could also be reading low as well as high. The next time I fill to 4,350 psi I’ll set the shutoff on the RovAir to 4,100 psi and see what happens.
I’m sorry, wives, for today’s report. But at least I did warn you up front.