On the advice of this forum, I changed out the handloads for my wife's -06 from Barnes 180gr TSX @ 2400fps to a 150gr TSX @ 2900fps as the goal was to reach that velocity to produce reliable expansion while making the recoil manageable and she can consistently put shots where needed. Her primary target is a golden wildebeest which is a relative of the blue, and they are considered to be rather tanky. After watching a few videos and interviews with PHs on Youtube and reading some previous threads here, it seems like a heavier bullet is preferred. I emailed the outfit I'm using asking about bullet weight and velocity and got a canned response "180gr Swifts are our preferred bullet, Barnes second" but no mention of velocity.
Now, there's no way of propelling a 180gr Barnes out of an -06 to 2900fps that wouldn't turn the gun into a pipe bomb. According to Barnes' reloading data, I was getting almost max velocity for a 180 using H4985. Other common powders aren't getting much more velocity gains. I could get somewhat near 2900fps with 165gr but using powder that I don't have ready access to and unsure if I could get enough anyway.
So here's what I know:
- yes, shot placement matters, but shot placement alone isn't the only factor
- Despite good shot placement, you need to be able to hit the vitals for placement to matter which brings us to...
- Sectional density matters for penetration, that's why PHs are asking for 180s. The SD between the 150 and 180 aren't that much different (.226 vs .271)
- which brings us to velocity. KE = .5mv^2 so velocity is a huge part of the kinetic energy equation, more input than bullet mass.
Now, I've done the calculations, and Barnes' recommended minimum velocity for reliable expansion for the TSX line is 2000fps. For the 180gr @ 2400, that gives me 250 yards of distance which is more than twice what my outfitter says the typical engagement range is for where we are hunting. I'm not sure why someone said I have to have the -06 going at 300Winmag velocity, probably my fault for taking that statement at face value.
So I'm looking for good recommendations here for a 30-06 load or performance parameters that can be fired by a 110 pound woman that stands a good chance of flattening a golden wildebeest. Will a 150gr Barnes @ 2900fps drop one? Will a 180gr @ 2400fps do it? Do I need bullets tipped with lead azide? At this point, I'm ready to just have the Ruger melted down and have her use my 7Backcountry.