I will as soon as I get thing's squared away and get some accuracy. Just giving a broad velocity on a few powders for now.Please post your loads for the Shermans so I can get them in the spreadsheet! I have s 7SS next on my build list. Still messing with the 6.5 MAX. 85gr HH next up
Oh, admit it! You really were looking for at least 3,500, weren't you?Finally got to do a little pew-pewing today with my Dad's birthday gift to me, his 1975 weatherby mark V.
Weatherby Mark V
26" tube (i think)
Weatherby brass, new
1/8 turn on a Lee FCD
indoor range ~70deg.
81gr--3,299 very faint ejector mark
81.5gr--3,313 little more ejector mark
82gr--3,340 blew a primer! She got hot quick!
Should I try a slower powder? 4955 is around the superformance/4831 burn rate. Or should i up it with IMR-4451 in that 4350 rate with 6 or 7 less grains to start?
I was hoping to get a safe 3,350 out of this one since factory 180gr accubonds shoot at 3,200. 3,300fps with a 178gr bullet will still whop an elk this fall so if 80.5-81gr shoots well I won't really complain.
For what it is worth, a lot of us shooting AHs are getting good results from H100V and StaBall 6.5. They have almost identical burn rates but the SB6.5 might give you better case capacity since it is ball powder, rather than the larger extruded powder of H100V. If not those two, then RL16 & 17 are a little faster and IMRs4350 and 4451are a little faster, yet. Personally, I'm using H100V in both my 280AI and 300WM with good results.These have to seat so deep to still fit in the magazine there’s not much room left.