Recent content by brianwinzor

Based on your experience of RL 50 in the 300 RUM with the 225 gn Hornady it appears to be a little slower burning than the AR 2218 that I am using. However, until you fire both in the same rifle with same bullet you can never be sure. I will contact the Australian dealer and see if he will...

I used AR 2218 (H50BMG in US) and Viht 20N29 (both stick powders) with the 156 grain ULD in my 257W with vastly different results. A maximum load of 70.0 grains AR 2218 produced 2872 fps and a loading density of 85%, which was a little better than the 81% with H870, but still way under what...

Paul, I am in the dark as to whether Wildcat bullets will be available again, and I just noticed that their website is still under development. Richard Graves the original owner of Wildcat bullets never had the time to do any specific testing to ascertain the ballistic coefficient of his...

Paul, In 2005 I began experimenting with the heavy 125, 130, 142 and 156 grain Wildcat bullets. I worked up and chronographed loads with those in my existing custom 25/06 AI, (Sako L61action, Shilen 24 inch 10 twist barrel) to see what velocities were achievable, although I knew that they would...

Sadly I no longer own a 257W, as my .257W, 25-06AI, and .224 Clark were stolen about 2 years ago. However, I still have the chrono data that I worked up in my Custom 257W, with REM 700, and Krieger 26 inch 1 in 7 twist barrel. (no freebore) Using Norma 257W cases, Federal 215 primer...

I do not own a 7mm RUM so I cannot give you data for that cartridge. However, I have used Viht N170 in a 25/06AI, 257Weatherby, and 300 RUM. I have found that my lot of Viht N170 is virtually identical in burning rate in the above cartrideges to AR2225 (H Retumbo in USA) In my Rem 700 300...

In 1986 I built a custom 220AI using a Rem 700, Douglas 25.5 inch 1-12 twist SS barrel. I hoped to use the 68 grain Hornady and 69 grain Sierra which had just been released in Oz, however, my testing quickly showed that the 12 twist barrel would not stabilise them. I found that with the...

I believe that I experienced an instance of powder bridging about 3 years ago when using my Custom .257 Weatherby, which had a Rem 700 Action, and Krieger 26 inch 1 in 7 twist barrel. I had previously worked up to maximum pressure with the Wildcat 156 grain ULD using 69.0 grains of H870, and...

I believe that I have experienced one instance of powder bridging. It occured in my custom .257Weatherby when using Viht 20N29 powder with the Wildcat 156 grain ULD. I had been using H870 and AR 2218 (H50BMG) with the 156 grain Wildcat, but was reaching maximimum pressure at 70.0 grains. This...

Kevin, I see no reason why Viht N170 would not work well with the Nosler 115BT in your 257W, and is definitely worth trying. It would also be worth trying in your 7mm STW, and 30/8mm Mag with the bullet weights you mentioned. About 10 months ago I tried it with the Nosler 115 BT in my...

I have used Viht N170 in a .224 Clark, 25/06AI, and 257W, and found that it has a similar or marginally slower burning rate to our ADI 2225 which is sold as HRetumbo in the US. I have included some chrono data below as an example of the above: 25/06AI Nosler 115 grain BT Viht N170 62.0 -...

Steve, I am not aware of any commercially made 224 bullets of over 90 grains. About 3 years ago I bought some Wildcat 100 grain ULD's to use in my .224 Clark. However, the bullets which used a J4 jacket disintegrated at about 2,700 fps in my Krieger 26 inch 6.5 twist barrel. Other users...

Kirby (Fifty Driver) has identified in his post, the main problems associated with .224 centrefires, heavy bullets, and fast twists. I have been using a 224 Clark for the last 20 years, which is a case that is very similar to the 22/6mmAI. The main difference between the 224 Clark and the...

About 4 years ago, I had similar issues with AR2217/H1000. Since about 1998, I had being using a supply of H1000, which bizarrely was made by ADI in Oz, and imported by a Canberra gunshop from Hodgdon in the US. I believe the Oz equivalent AR2217 was not released by ADI in Oz until sometime...

I just looked up several of Kirbys old posts, and he reported powder bridging issues using Rl25 and HRetumbo in his 22/6mm AI (40) with the Wildcat 100 grain ULD. So far (400 shots) I have used AR2225 (HRetumbo in US), AR 2218 (H50BMG in US), VihtN170, and H870, in my 224 Clark (22/257 AI...