05-28-2023, 10:48 PM
Check the mgspd frequently until you have a good idea of how it's holding. I had to do that at first, but still check every 4-5 loads or so.
My opinion, if those loads show your load spread you are loading too fast, too far apart as to load values. For a new bullet (to you), and new process you should start at the 28.4 then increase by 0.3 gr, some guys use 5 per load step, I do a ladder first then 4 per step once I know what my barrel will do.
So either
a. 1 at 28.4, 1-28.7, 1-29.0, 1-29.3, 1-29.6. Mayve add a 29.9.
or
b. 4 ea at, again, 28.4, 28.7, 29.0, 29.3, 29.6.
Watching it all the time (during the shooting) b/c if you start to see 100+ fps more than Hornady, something is way off.
Magneto all of them, then take the data back to graph it out.
Take that data back to the bench and evaluate. You have a 24" barrel, so did they for this load data. Could be your throat is shorter than theirs was (did you check the oal to make sure you were off the lands? I would load all-copper like that, conservatively, 50-60 thou off the lands since it is tougher to engrave in the barrel than cup/core.).
Some early barrels had short throats, hornady "fixed" it by shortening their 105 bthp ammo but IMO those throats were still short. Short throat means higher pressure and unrealistically higher MV. Just one thought on what you're seeing.
If it is your scales then you should be able to find that out easily...
Anyway keep us posted.
My opinion, if those loads show your load spread you are loading too fast, too far apart as to load values. For a new bullet (to you), and new process you should start at the 28.4 then increase by 0.3 gr, some guys use 5 per load step, I do a ladder first then 4 per step once I know what my barrel will do.
So either
a. 1 at 28.4, 1-28.7, 1-29.0, 1-29.3, 1-29.6. Mayve add a 29.9.
or
b. 4 ea at, again, 28.4, 28.7, 29.0, 29.3, 29.6.
Watching it all the time (during the shooting) b/c if you start to see 100+ fps more than Hornady, something is way off.
Magneto all of them, then take the data back to graph it out.
Take that data back to the bench and evaluate. You have a 24" barrel, so did they for this load data. Could be your throat is shorter than theirs was (did you check the oal to make sure you were off the lands? I would load all-copper like that, conservatively, 50-60 thou off the lands since it is tougher to engrave in the barrel than cup/core.).
Some early barrels had short throats, hornady "fixed" it by shortening their 105 bthp ammo but IMO those throats were still short. Short throat means higher pressure and unrealistically higher MV. Just one thought on what you're seeing.
If it is your scales then you should be able to find that out easily...
Anyway keep us posted.