I saw some issues with the Katran not regulating properly, and wanted to add my .02, so here's todays chrony session.
This is a Katran L (cylinder not bottle)
It goes off the reg, right around 100-110bar. I pumped it up to 240bar (it's rated for 300bar), and fired a full string over the chrony. This is not the first time I've chrony'd it, and I'm happy to say, poi and results were nearly identical to the last chrony/accuracy session. I used Benjamin black box single die 10.5 gr pellets.
80 shots
921 fps avg
9 es
.98 %es (yes that's point 98%)
1.91 stdev
I see a lot of talk on other forums saying a stdev of 5 is good, and a 40fps es is good yatta, yatta, yatta. I'm relatively sure they're "selling" guns and not reviewing them objectively. I don't have a pcp that can't keep es around 10 or slightly above, and stdev of less than 3fps. I also like the %es to be around 2% or less. I bought this .177 Katran from UA and couldn't be happier with it. The accuracy, even at this velocity is nothing short of amazing. This could well be my favorite .177 rifle. I've had not one single problem with it. It likes almost any ammo you feed it, in nearly any weight. With the reg set so low, I can't help that there is more power to use, should I want to go to heavier pellets. I've been meaning to see how fast I can get 13 gr JSB accurately, but it shoots so good with 10.5 I hate to mess with it.
So, if you have an inconsistent Katran, I'd be giving UA a call and see what they suggest as the gun is quite capable.
This is a Katran L (cylinder not bottle)
It goes off the reg, right around 100-110bar. I pumped it up to 240bar (it's rated for 300bar), and fired a full string over the chrony. This is not the first time I've chrony'd it, and I'm happy to say, poi and results were nearly identical to the last chrony/accuracy session. I used Benjamin black box single die 10.5 gr pellets.
80 shots
921 fps avg
9 es
.98 %es (yes that's point 98%)
1.91 stdev
I see a lot of talk on other forums saying a stdev of 5 is good, and a 40fps es is good yatta, yatta, yatta. I'm relatively sure they're "selling" guns and not reviewing them objectively. I don't have a pcp that can't keep es around 10 or slightly above, and stdev of less than 3fps. I also like the %es to be around 2% or less. I bought this .177 Katran from UA and couldn't be happier with it. The accuracy, even at this velocity is nothing short of amazing. This could well be my favorite .177 rifle. I've had not one single problem with it. It likes almost any ammo you feed it, in nearly any weight. With the reg set so low, I can't help that there is more power to use, should I want to go to heavier pellets. I've been meaning to see how fast I can get 13 gr JSB accurately, but it shoots so good with 10.5 I hate to mess with it.
So, if you have an inconsistent Katran, I'd be giving UA a call and see what they suggest as the gun is quite capable.
