Hello all,
I'm about to work up a new .223 load using 69 gr SMK for a Rem 700 SPS Tactical (1 in 9 twist). I'm not sure of the powder, will see what the local store has in stock. Hoping for Varget, H335, or AA2230. From what I've read the 69gr is pretty forgiving.
The only other load I've done for this gun is a 55 gr VMAX over 24.3 gr of IMR 4895, which I seated to make the OAL 2.26. Groups ranged from .3 to .75 when I did my part.
I realize that 2.26 is the limit because of mag size, is it worth experimenting with seating the bullet closer to the rifling? I made a couple of lightly seated dummy rounds and chambered them, averaged 2.31. I understand that that number is accurate only with the 69gr SMK.
When I make up rounds with a range of charges will I necessarily have better luck if I seat them at 2.28? 2.27? Is that a good starting point? I don't want to introduce too many variables because I'm still new at this. Should I find what produces good groups at 2.26, then experiment with seating depth?
This is all complicated by the fact that I do my reloading away from my home, and really have only one range trip to figure out what works. I'm willing to accept that I may not get the best possibly groups if I don't experiment with OAL, but the rifle will at this point still shoot better than I.
Should I stick with 2.26, or go a bit longer assuming it will tighten the groups a bit?
Thanks,
Ryan
I'm about to work up a new .223 load using 69 gr SMK for a Rem 700 SPS Tactical (1 in 9 twist). I'm not sure of the powder, will see what the local store has in stock. Hoping for Varget, H335, or AA2230. From what I've read the 69gr is pretty forgiving.
The only other load I've done for this gun is a 55 gr VMAX over 24.3 gr of IMR 4895, which I seated to make the OAL 2.26. Groups ranged from .3 to .75 when I did my part.
I realize that 2.26 is the limit because of mag size, is it worth experimenting with seating the bullet closer to the rifling? I made a couple of lightly seated dummy rounds and chambered them, averaged 2.31. I understand that that number is accurate only with the 69gr SMK.
When I make up rounds with a range of charges will I necessarily have better luck if I seat them at 2.28? 2.27? Is that a good starting point? I don't want to introduce too many variables because I'm still new at this. Should I find what produces good groups at 2.26, then experiment with seating depth?
This is all complicated by the fact that I do my reloading away from my home, and really have only one range trip to figure out what works. I'm willing to accept that I may not get the best possibly groups if I don't experiment with OAL, but the rifle will at this point still shoot better than I.
Should I stick with 2.26, or go a bit longer assuming it will tighten the groups a bit?
Thanks,
Ryan