Canadian Airgun Forum

The #1 Community for Airguns in Canada!
It is currently Wed Nov 20, 2019 12:04 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  [ 12 posts ] 
Author Message
 Post subject: big bore test results
PostPosted: Sun Aug 11, 2013 3:17 pm 
Offline

Joined: Sun Nov 18, 2012 3:21 pm
Posts: 61
Location: uk
Hi all some test results from todays session not as good as I had hoped I used a stronger spring this gave me plenty of power 631fps but only 2 shots


Attachments:
Photo0132.jpg
Photo0132.jpg [ 41.24 KiB | Viewed 697 times ]
Top
 Profile  
 
PostPosted: Sun Aug 11, 2013 3:18 pm 
Offline

Joined: Sun Nov 18, 2012 3:21 pm
Posts: 61
Location: uk
sorry wrong photo


Top
 Profile  
 
PostPosted: Sun Aug 11, 2013 3:20 pm 
Offline

Joined: Sun Nov 18, 2012 3:21 pm
Posts: 61
Location: uk
correct pic


Attachments:
Photo0131.jpg
Photo0131.jpg [ 44.71 KiB | Viewed 693 times ]
Top
 Profile  
 
PostPosted: Sun Aug 11, 2013 6:23 pm 
Offline

Joined: Sun Oct 26, 2008 6:14 pm
Posts: 1343
Location: quebec
how far was it ??

as i see ,
its hard to say like that whitout the gun ,,
but it seem soon possible to fix the aim accuracy

if you dont have any lost in air per shot ,,your gun should benifit of a double air tube
or keep you refill not too far :lol: ,

interesting
target man

_________________
9 mm cal,discovery pumper
.25 cal,crosman pumper


Top
 Profile  
 
PostPosted: Mon Aug 12, 2013 4:41 am 
Offline
User avatar

Joined: Sun Jul 15, 2012 10:49 am
Posts: 6029
Location: Victoria, BC and Clarkston, WA
Orr a carbon fibre tank in a backpack with a hose to the main tube.

_________________
-Rick
Pardini K10
Brocock Concept .22
3 Custom Crosman 2260
Benjamin Discovery .22 w/Joe Hickey stock!
Crosman 150 pistol .22
4 Crosman MK 1 pistol .22
Mrodair CP-1M .22 and .177


Top
 Profile  
 
PostPosted: Mon Aug 12, 2013 8:14 am 
Offline
User avatar

Joined: Tue Jun 03, 2008 5:46 pm
Posts: 2815
Location: Canada
You're still running this on comparatively low pressure? Doing rather well IMO. :)

Have you considered CO2?

Al


Top
 Profile  
 
PostPosted: Mon Aug 12, 2013 11:59 am 
Offline

Joined: Sun Nov 18, 2012 3:21 pm
Posts: 61
Location: uk
I have thought about co2 I just need to change the o rings im sorry there was not more pics but my son filmed most of the test I will put the lighter hammer back in with the stronger spring and see what the results are, my accuracy with the home made barrel was hindered by the bolt being blown open by the extra air will try to sort this as soon as poss thanks for all your help keep it coming


Top
 Profile  
 
PostPosted: Mon Aug 12, 2013 1:00 pm 
Offline
User avatar

Joined: Thu Feb 02, 2006 11:35 pm
Posts: 3099
Location: Alberta Canada
Gippeto wrote:
You're still running this on comparatively low pressure? Doing rather well IMO. :)

Have you considered CO2?

Al

I totally agree with Gipetto here. Due to your low charge pressure with air. The consistant expansion of Co2 and the large calibre might be a benificial option for you. Only factor would be ambient temperatures.

_________________
May the cry of the pack be with you upon your hunt

Whitewolf


Top
 Profile  
 
PostPosted: Mon Aug 12, 2013 2:13 pm 
Offline
User avatar

Joined: Sat Nov 03, 2007 4:19 pm
Posts: 8978
Location: Coalmont BC
Not knowing what the design pressure of this gun is, I won't jump on the bandwagon to recommend CO2 quite so quickly.... While CO2 is "only" 850 psi at 70*F, it can get to 1900 psi at 120*F, and it runs 1400 psi at 100*F.... CO2 tanks are hydrostatically tested to 3000 psi, and IMO if a design isn't tested, it should be designed for a minimum 2:1 safety factor above the 1900 psi considered "safe" for CO2, ie 3800 psi minimum burst pressure.... CO2 tanks run a 3000 psi burst disc, and that is only 26% above the burst disc pressure.... There could even be an argument made for a 6000 psi (or more) burst rating on a system running a 3K burst disc....

I'm not trying to discourage the OP here.... just wanting him to be aware that CO2 pressures are NOT constant, but vary tremendously with temperature.... and that CO2 bulk tanks use a 3K burst disc so the gun should be designed to be safe well beyond that....

Bob

_________________
Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal;
Too many! Springers, Pumpers, CO2, but I love my PCPs and developing them!
Proud Member of the 2000+fps Club!


Top
 Profile  
 
PostPosted: Mon Aug 12, 2013 3:50 pm 
Offline

Joined: Sun Nov 18, 2012 3:21 pm
Posts: 61
Location: uk
just to say guys the test pressure was 1000 psi to start I got 2 shots best 631fps worst 588fps then 800psi best 617fps worst 558fps


Top
 Profile  
 
PostPosted: Tue Aug 13, 2013 12:44 am 
Offline
User avatar

Joined: Fri Jun 26, 2009 7:42 am
Posts: 4080
Location: Somewhere In Time
bigborebrit wrote:
just to say guys the test pressure was 1000 psi to start I got 2 shots best 631fps worst 588fps then 800psi best 617fps worst 558fps



And how big was the hunk of lead you were shooting? :)

Sounds like decent velocity if its heavy stuff, especially at 1000PSI, that is when I refill my big bore :lol:

_________________
"Are you guys silly? I'm still gonna send it..."


Top
 Profile  
 
PostPosted: Thu Aug 15, 2013 3:18 pm 
Offline

Joined: Sun Nov 18, 2012 3:21 pm
Posts: 61
Location: uk
.468 round ball


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 12 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 1 guest


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