The only test I saw on twist rates was done by Tom Gaylord in his PA blog but he only used diabolo pellets.Must be shipped to an FFL or Licensed Ammunition Vendor unless you are an exempt peace officer. I'd like to test my PCP rifles with a faster TR with cast ammo too. It would be interesting to see how they did with a 1:14 or 1:12 barrel. Those quiet rounds might perform better with light projectiles or even skirted ammo. From memory, they didn't have barrels with unusually fast twist rates. The few 257 pcp guns I have seen that were accurate at 100 yards) were far more powerful than anything I own. I assumed that they needed more power but I guess a slightly faster twist rate couldn't hurt too. ![]() I have never been able to achieve decent accuracy with any of them past 40 yards from an air rifle. I have bunch of 25 cal cast bullets ranging from 50gr to 58gr. The issue is magnified with those RF bullets because they aren't drag stabilized like the diabolo pellets (at least they don't look like that have skirts in the pic). They start to lose accuracy at anything below 75% power. ![]() On the lowest setting, they barely reach the end of my garden. I can do a meaningful experiment with my Career 707 using it's power wheel which allows me to adjust the speed with 43gr pellets from over 1000fps to under 200. If there were, I would want more power than you get in your typical 22 pcp. I can't think of many (if any) 22 pellets that weigh 40gr. Those 22 cal quiet RF rounds deliver approx 35fpe which is comparable to an average 22 cal pcp but the projectile is far heavier. This is obviously high for a 25 cal so the heavy pellets are needed to keep it subsonic. One puts out 90-100fpe and the other (my carbine) puts out 60fpe. I typically use 43gr Eun Jin pellets in unusually powerful air rifles like my two Career 707 25 cals. I would guess that the difference in twist rates is not enough to cause such a difference in accuracy at the short ranges we are talking about (if there was enough power). I don't know what the deal is but if I had to guess why they aren't accurate past 40 yards, I would say that the energy is a little low for that weight of projectile. 25 and 30 cal air rifle barrels still have the same twist rate. There are plenty of pellets that are more than 40gr. You could get better performance than some of those air rifles by spitting the pellet through a straw. They are probably comparing it to one of those awful $80 "magnum springers" from Walmart which sound like someone dropping a piano out of a 3rd floor window. My guess is that the makers of those Quiet bullets have never heard a decent PCP gun. My neighbors don't even look up to see where the noise came from. My shrouded 22 pcp guns just make a ping or a puff sound. It might still sound louder to the shooter though as gun shots are a threatening noise. If it sounds like a gun shot, even a quiet one, a certain type of neighbor might call the police on you.Ħ8db (if their advertising is truthful) is quieter than any 22 pcp gun I own with or without baffles. If the noise sounded like a hair dryer, even if it was super loud, nobody would call the police. To some extent, the pitch of the noise is more important than the db reading. There is a difference between the measurable noise level and the perceived noise though. It would mean that for someone with a license to legally own a firearms silencer, they could use their 22lr to plink like it was an air rifle in towns that allow it. 24 hours later and it's still surprising to me. I'm not sure about the accuracy, and legality probably varies by state and country.Ĭlick to expand. I believe their marketing claim by the ammo manufacturers. All I could hear was the hammer spring, and I could only hear that because the gun was in intimate contact with my head. PCP air rifle shooting at similar energy. (73 FPE) It was MUCH quieter than an un-shrouded. ![]() It was my great uncle's Marlin 39A lever action, with. It has been many moons since I've shot a subsonic. In the above comparison, the only difference in noise would be whether there is more noise from the air compressed behind the pellet suddenly escaping or from the burning gases from the powderburner. Even if a 10/22's bolt won't open far enough to cycle subsonic ammo, it does open enough to let the noise out. Guys, you can't compare the noise from a 22 rimfire from an automatic action to a airgun with a sealed action.
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