Why 5 round groups are bull.
I have been experimenting with a TC contender barrel in 44 magnum for a while. I was trying for the longest time to get Lee 310 grain cast bullets to group well, but was running into leading and inaccuracy problems. I picked up some Sierra 250 grain FP jacketed bullets and loaded them with 9 grains of NM04 (like bullseye). This gave me 1075 fps average and a stdev of 17 fps.
The first five rounds hit the bullseye with a 1-3/4 inch group, the next five opened up the group to 4-1/4 inches. The cast bullets are grouping about 2 inches wide and 8 inches high. Both loads shot at 100 yards.
I thought that I was doomed when shooting subsonic with a 1-22 twist barrel, but this looks promising. I finally got my ATF form 1 back approved. I will make a silencer for it that covers most of the barrel and extends about ten inches past the muzzle.
I am going to get some 445 super magnum brass and see if I can seat the bullets out to the lands to improve accuracy.
Ranb
16 May 2010, 06:31
Idaho SharpshooterNo offense, but what does this have to do with group size?
5-shots has been the standard for the best part of the 20th century, and continues. Ask any benchrest organization.
regards,
Rich
DRSS
PS: try changing your lube
None taken.

The thread title is actually meant as a humorous jab at those who brag about their sub-moa accuracy based on a single three or five round group. Ten rounds is just a better example of how accurate a firearm is.
But I digress. I started with Lee alox, but am trying out a homemade lube made from paraffin wax and mineral oil. It appears to leave less lead in the bore and prevents the awful degradation in accuracy that results from the fouling.
I did learn the hard way that crimping and fast powders were also really bad for leading of the bore when using my cast bullets in this barrel.
Ranb
16 May 2010, 06:51
Idaho SharpshooterA lot of guys in the CBA are using Johnson's Paste Wax and just tumbling their bullets. Tried that?
Rich
DRSS
The furniture wax?
http://doitbest.com/Main.aspx?...tm_campaign=DATAFEEDThat is a new one for me. By tumbling you mean put some wax in a bowl, add bullets and mix them up? Interesting.
Ranb
16 May 2010, 20:50
Low WallHello ranb40,
Fooling around trying to make your own lube can be a joy unto itself..
But if you want to get to accuracy sooner you might try some of Lar45 (screen name for this forum)lube...
While I haven't used of his lube many others have and are pleased with it.. I would give him a call, explain what you are trying to do so he could recommend which of his lubes would best fill your needs..
Here is a link to his website:
http://www.lsstuff.com/lube/