Lennyjoe
Member
I finally got some 165gr SPBT Sierra bullets to reload for my -06 and noticed a couple of different loads for the IMR 4350 powder.
In the past I have been loading the 165 HPBT Sierra bullets with 57.5gr of IMR 4350 with great results. Its throwing them 2900fps with excellent groups so I thought I would try the SPBT Gameking as well.
Now I see that there are several different books that have different max loads. For instance;
Loadbooks USA list the load at 47.5 - 56.0 on page 29.
IMR powder guide lists at 60.0C load at 2934 fps and 57,600 psi cup.
Like I said before, I have had good results with the 57.5gr of powder under the HP Gameking so I started at 56.0 and went up to 59.0 on the SPBT. I will put it thru the chrono and check each fired round for pressure signs.
I just think its odd that different books list different max loads. Guess thats why we start low and work our way up huh.
In the past I have been loading the 165 HPBT Sierra bullets with 57.5gr of IMR 4350 with great results. Its throwing them 2900fps with excellent groups so I thought I would try the SPBT Gameking as well.
Now I see that there are several different books that have different max loads. For instance;
Loadbooks USA list the load at 47.5 - 56.0 on page 29.
IMR powder guide lists at 60.0C load at 2934 fps and 57,600 psi cup.
Like I said before, I have had good results with the 57.5gr of powder under the HP Gameking so I started at 56.0 and went up to 59.0 on the SPBT. I will put it thru the chrono and check each fired round for pressure signs.
I just think its odd that different books list different max loads. Guess thats why we start low and work our way up huh.
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