Canadian Airgun Forum

The #1 Community for Airguns in Canada!
It is currently Mon Dec 16, 2019 5:05 am

All times are UTC - 5 hours


The Canadian Airgun Forums are a place for people to discuss and learn about airguns and the airgunning sport in Canada. There are lots of discussions about airguns, airgun accessories, reviews, modification and repair information, airgun events, field target and free classifieds!

 

You need to register before you can post: click the register link to proceed. Before you register, please read the forum rules. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload your own pictures, and access many other special features. Registration is fast, simple, and absolutely free! To start viewing messages, select the forum that you want to visit from the selection below.








Post new topic Reply to topic  [ 1 post ] 
Author Message
PostPosted: Tue Aug 16, 2016 4:20 pm 
Offline

Joined: Sun Jul 19, 2015 7:25 pm
Posts: 37
Hi there,
I'm wondering if anyone knows how to properly adjust the velocity on the FTP 900. I got some JSB 7.87's sent to me by accident, but they actually group really well, so i wanted to adjust the power up a touch to be closer to 12fpe for FT. I know on my old s400 MPR, there was a "secret screw" to open up the transfer port to increase the velocity, and it worked no problem. On the FTP 900, apparently there's an export model and a UK model. The UK model only has a screw on the right side of the rifle (as you're looking down the barrel) which is only meant to LOWER velocity. The export model has a screw on both sides of the rifle. As expected, when i tried opening up the transfer port from the right side, velocity did not increase. From the left side, i was able to dial the velocity up to 825fps, which would gave me 11.89fpe. I shot about 100 shots through it, then checked it again, but the velocity had increased up to 846fps at that point. I can't find a lot of info out there to see if the left and right screws are meant to work in conjunction with each other or if there's something wrong with the left side screw (loose or something) that is letting it move further out with vibration.
CHrony is a Caldwell, i use it to tune all my rifles and i believe it to be consistent. I shoot through the chrony using the scope at a point on a target 10 yards away, so i believe that to be consistent as well. THe pellets are all from the same tin, washed and lubed with Lupus oil, and pellet gage has them all pretty consistent.
ANy help would be appreciated.
Thanks!
​RYan


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 1 post ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 4 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
News News Site map Site map SitemapIndex SitemapIndex RSS Feed RSS Feed Channel list Channel list

Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group

phpBB SEO