Fox copper bullets.

I’m currently sitting loading a batch meticulously measuring the OAL’s and will go from 2.74” down to 2.68” in 0.001” increments avoiding the 2.73 and 2.69 as I’ve tried those already...3 of each and will see if that changes anything.

regards,
Gixer
 
As said before, a mate has been using copper for more than 10 years and he finds anything from 0.100" and more of a jump to the lands is where he finds they work
 
I’m currently sitting loading a batch meticulously measuring the OAL’s and will go from 2.74” down to 2.68” in 0.001” increments avoiding the 2.73 and 2.69 as I’ve tried those already...3 of each and will see if that changes anything.

regards,
Gixer
It will definitely change the contents of your wallet ;).
Seriously, 0.001 steps are nothing but cheating yourself. This sort of variation disappears in the manufacturing tolerances of the bullets and the seating process. Go in 0.010 steps or anything in this range and don‘t make yourself mad.

Solids are usually used for stalking, so they need to fit into the magazine. Further, I back off in the order of. 0.080 to 0.100 from the lands. And I want the case mouth to sit on one of the drive bands. This pretty much determines a technical OAL . And if the bloody thing won‘t shoot then that‘s that. But it usually does.
 
Last edited:
Hand press for sale here - For Sale: - K&M press and dial indicator
Regards
JCS

JCS,

Your reply is against what I meant. You can’t use standard dies with the arbour press. It’s a whole new setup.

For less than £50 you can take existing dies to the range.

 
  • Like
Reactions: Acm
It will definitely change the contents of your wallet ;).
Seriously, 0.001 steps are nothing but cheating yourself. This sort of variation disappears in the manufacturing tolerances of the bullets and the seating process. Go in 0.010 steps or anything in this range and don‘t make yourself mad.

Solids are usually used for stalking, so they need to fit into the magazine. Further, I back off in the order of. 0.080 to 0.100 from the lands. And I want the case mouth to sit on one of the drive bands. This pretty much determines a technical OAL . And if the bloody thing won‘t shoot then that‘s that. But it usually does.
It was a typo...it is .010 steps.
 
It will definitely change the contents of your wallet ;).
Seriously, 0.001 steps are nothing but cheating yourself. This sort of variation disappears in the manufacturing tolerances of the bullets and the seating process. Go in 0.010 steps or anything in this range and don‘t make yourself mad.

Solids are usually used for stalking, so they need to fit into the magazine. Further, I back off in the order of. 0.080 to 0.100 from the lands. And I want the case mouth to sit on one of the drive bands. This pretty much determines a technical OAL . And if the bloody thing won‘t shoot then that‘s that. But it usually does.
As a side note I calipered the remaining 26 bullets in the box and fox did well, out of those 26 all were the same OAL within .0005” bar 2 which were .001” longer. Not bad!
 
As a side note I calipered the remaining 26 bullets in the box and fox did well, out of those 26 all were the same OAL within .0005” bar 2 which were .001” longer. Not bad!
Very well. Though, when I speak of OAL I hardly ever mean the absolute value of a random round. My OAL always refers to a ‚reference bullet‘ of a given length. Any other bullet of a different length should produce a cartridge longer or shorter of the same difference.
 
Finally some results with the Fox 123gr’s....stuck with the 42gr of RS62 and did a test with batches of rounds changing only the seating depth in .010” increments. Looks like these fox’s do like a jump as the shorter the rounds got the more the group tightened up...the speeds are pretty consistent so looks like 2.68” OAL is the winner...

never had to mess around so much with a bullet to get it to group! Not sure if that’s a copper thing or just these!

based on the info from fox the velocity (2650fps) should be fine for way past the ranges I intend to shoot at.

now to test them on a deer or two!

regards,
Gixer
 

Attachments

  • E35A6211-E0EA-43F4-9E04-17E3F7D56F4F.webp
    E35A6211-E0EA-43F4-9E04-17E3F7D56F4F.webp
    101.7 KB · Views: 64
  • 50449137-5890-4A09-A544-3BC35211C8C8.webp
    50449137-5890-4A09-A544-3BC35211C8C8.webp
    530.1 KB · Views: 61
Finally some results with the Fox 123gr’s....stuck with the 42gr of RS62 and did a test with batches of rounds changing only the seating depth in .010” increments. Looks like these fox’s do like a jump as the shorter the rounds got the more the group tightened up...the speeds are pretty consistent so looks like 2.68” OAL is the winner...

never had to mess around so much with a bullet to get it to group! Not sure if that’s a copper thing or just these!

based on the info from fox the velocity (2650fps) should be fine for way past the ranges I intend to shoot at.

now to test them on a deer or two!

regards,
Gixer
Pretty much what my mate was finding too. Glad you got it sorted.

Worth noting his are TTSX. So looks. Like possibly a copper trait
 
Back
Top