View Single Post
Old 21st November 2012, 10:03 PM
5teve L 5teve L is offline
Join Date: Apr 2009
Member of: The Oaks & Horsham hawks
Location: Horsham, West Sussex.
Posts: 1,183

Originally Posted by Dave Ramshead View Post
I tested them on Sunday in my FT gun which is set up for JSB made superfield 8.4's

I checked chrono readings on saturday evening. The 4.50 size were coming out exactly the same speed as the sf, the 4.52 size chronoed 8fps slower. Very good tight chrono readings overall with both head sizes.

On the cards, using 25 yd as zero, I needed to dial 0.5 moa less at 55yd with the 4.50 and the same as sf's for 4.52 headsize - so not really any significant difference in better bc. My barrel with the sf's has a bc of 0.024

Group size, 4.50 head size were no good in my barrel, 4.52 were much better, but didn't match what I get with the jsb made stuff.

Some more testing to do with lube etc
Be interested to hear if lube makes a difference Dave
I have just got some of both sizes to test as well through the MPR.
In life you should not persue goals that are easily achieved, develop an instinct for what can be only just achieved through your greatest efforts.
Reply With Quote