Hello everyone,
I have a question regarding Gamo's barrels, specifically the twist rates in the bores of their barrels... First of all, before I start interogating folks here about the whole matter, I'd like to point out, that I do realize that a suitable twist rate for about 18 ft/lbs springers is 1:16".
Gamo's springers in their "1000 fps" category/family of airguns are nominaly built around a power plant that generates (in expansion), some 18 ft/lbs of muzzle energy (that's 24 Joules), meaning that a .22 caliber, 15.89 gr JSB Jumbo will have an output energy level of 16 ft/lbs, or a velocity of 650 fps. I have one such Gamo rifle, in this "1000fps" category, it's the Black Bear in .22cal, and I'm really satisfied with its accuracy. I guess it's got both, a healthy power plant and a good barrel (crown especially), with a corresponding twist rate.
However, I've also got a Gamo Varmint or Big Cat 1000, as it titled here in Europe, which I think would profit from a replacement of the old "pencil" barrel with a new one, which is thicker (talking about this Bull Barrel here), and that's why I've decided to look into bore twist rates as well, before actually purchsing anything, that would turn out usless afteward. I reckon these Bull Barrels dampen harmonics pretty well, since they're thick and have additional supports/shroud in them. Therefore they probably offer good accuracy too.
The reason I'm asking the question on the twist rate of this Bull Barrel, is because I've read somewhere, some time ago, that the older Gamo springers, including some of the more modern ones (not really sure about their modern guns, but this is plausible nevertheless), have a 1:25 twist rate in the bore! That's not your typical .22 cal. springer barrel twist rate, from most other manufacturers. That's a rather slow twist rate - it should be around 1:16, not 1:25. Once such Gamo model that had this kind of twist in it, was the older CFX (the one with the metal trigger - modern Gamo trigger are all plastic), and I know that for certain, but what about this Bull Barrel, what twist rate does it have?! Some people have speculated that Gamo's springers, both old and new, have a whole wide array of different twists in their barrels, everything from 1:12 on lower powered guns, 1:16 - most common, to 1:18 and all the way up to 1:25.
It makes me wonder, why they put 1:25 twist rate in the barrel of the older CFX? Would the older CFX even be accurate with heavier pellets or slugs - with slugs probably not a chance, but you never know; Physics have a strange sense of humor
So, if anyone knows what twist rate does this barrel have, I'd like to know very much and thank you in advance
Have a nice remainder of the week folks!
I have a question regarding Gamo's barrels, specifically the twist rates in the bores of their barrels... First of all, before I start interogating folks here about the whole matter, I'd like to point out, that I do realize that a suitable twist rate for about 18 ft/lbs springers is 1:16".
Gamo's springers in their "1000 fps" category/family of airguns are nominaly built around a power plant that generates (in expansion), some 18 ft/lbs of muzzle energy (that's 24 Joules), meaning that a .22 caliber, 15.89 gr JSB Jumbo will have an output energy level of 16 ft/lbs, or a velocity of 650 fps. I have one such Gamo rifle, in this "1000fps" category, it's the Black Bear in .22cal, and I'm really satisfied with its accuracy. I guess it's got both, a healthy power plant and a good barrel (crown especially), with a corresponding twist rate.
However, I've also got a Gamo Varmint or Big Cat 1000, as it titled here in Europe, which I think would profit from a replacement of the old "pencil" barrel with a new one, which is thicker (talking about this Bull Barrel here), and that's why I've decided to look into bore twist rates as well, before actually purchsing anything, that would turn out usless afteward. I reckon these Bull Barrels dampen harmonics pretty well, since they're thick and have additional supports/shroud in them. Therefore they probably offer good accuracy too.
The reason I'm asking the question on the twist rate of this Bull Barrel, is because I've read somewhere, some time ago, that the older Gamo springers, including some of the more modern ones (not really sure about their modern guns, but this is plausible nevertheless), have a 1:25 twist rate in the bore! That's not your typical .22 cal. springer barrel twist rate, from most other manufacturers. That's a rather slow twist rate - it should be around 1:16, not 1:25. Once such Gamo model that had this kind of twist in it, was the older CFX (the one with the metal trigger - modern Gamo trigger are all plastic), and I know that for certain, but what about this Bull Barrel, what twist rate does it have?! Some people have speculated that Gamo's springers, both old and new, have a whole wide array of different twists in their barrels, everything from 1:12 on lower powered guns, 1:16 - most common, to 1:18 and all the way up to 1:25.
It makes me wonder, why they put 1:25 twist rate in the barrel of the older CFX? Would the older CFX even be accurate with heavier pellets or slugs - with slugs probably not a chance, but you never know; Physics have a strange sense of humor
So, if anyone knows what twist rate does this barrel have, I'd like to know very much and thank you in advance
Have a nice remainder of the week folks!
