I’m dealing with the dilemma of having a match bullet shoot great in my rifle but did not perform well on game. I shoot a .308 Tikka with a 20” barrel. It loves factory SMK’s but I was hesitant to use a match bullet on game. It shot them so well I decided to use them. I shot a cow elk at 450 yards through both lungs. Pencil size hole on one side, dime size on the other. She walked around for 2 minutes before going down. I was on a hunt with a guide and he didn’t want me to shoot her again otherwise I would have. About the time he wanted me to shoot again she went down. So what happened? I know that one sample size is not enough but it makes me nervous. Bullet was going roughly 1900fps, too slow? Bad round?OTM- "Open Tip Match" is the other critical consideration for performance of a target/match bullet.
The open tips of "target" bullet is critical to terminal performance. Though people refer to them as "hollow points, they are more technically/specifically called "open tip" bullets. Hollow point seems to be a more common term and use as a broader category from the past to mean "not FMJ and not soft point lead."
Berger uses the term OTM, to be more precise about it. But, it seems most shooters consider hollow points to be any bullets with the tip left "open". But, as I understand, the term hollow point is better referred to bullets with tips purposefully left "open" as a reason to initiate quick expansion, like handgun ammo that is easy to visualize.
Match/target bullets are not "hollow point" under that definition. All match bullets are "open tip" as an artifact/result of the best manufacturing process available to create the most consistent bullets. Just like you can see "crinkles" in the jacket, open tips are an unintentional part of the manufacturing process. Unlike handgun "hollow points" leaving the tip open is not for any specific purpose, it is just the condition that the bullet is left in at the end of the manufacturing process.
Besides the open tip, there is a small void or empty space inside the tip without lead in it. Like the open tip, that small void is a result of manufacturing, not intentional. So, a bullet that "pencils through" could be one that is just out of manufacturing spec with a little more lead/smaller void, little thicker jacket, and maybe a smaller opening in the tip. That combination would prevent the tip from initiating fragmentation in soft tissue at slower velocities/longer ranges. I think everyone agrees that higher velocity can make a significant difference in terminal performance and failures are more common at lower velocities.
Tipped bullets like ELDm and TMK are built with a larger "open tip" and void that accepts the plastic pointy tip. Of course, the plastic tip initiates expansion of the larger hole behind it just like a soft point hunting round initiates expansion. And, having the bigger open tip in the jacket plus the plastic tip is what makes the ELDm "more explosive" and earlier fragmentation upon less penetration than a Berger.
So, for terminal performance on game, having an open tip, thin jacket, and void behind the tip is necessary to initiate fragmentation of match bullets. Otherwise, they will act like a full metal jacket that has nothing to initiate expansion/fragmentation in soft tissue. In match bullets, it is the initial expansion/bending or whatever you want to call it to the tip that then causes the fragmentation of the bullet, that then causes all the carnage. Yaw and tumbling of an intact bullet without expansion/fragmentation destroys tissue as well, but that is because the bullet is traveling sideways, rather than "penciling."
Berger's testing shows that the "tipped" bullets don't necessarily make a bullet's BC more consistent. If I am not mistaken, I think Berger recently started their new "pointing" process in manufacturing to decrease BC variation as a result of the variation that exists in the "open tip." But, they only do that to their target bullets because the need for the tip to initiate fragmentation. Someone can correct me if I am wrong.
All that to now say that another cause of failure of a match bullet to fragment is that the tip doesn't collapse or open up enough to initiate the fragmentation. With the small fraction failures reported in "questionable brands" it could be manufacturing differences and consistency of the open tip combined with thicker jackets. Just a little variation in manufacturing could potentially be the cause of the failures: if a jacket is a little thicker, there is a little more lead behind the tip/smaller void, or the tip is a little more closed than typical.
To that end, I know that some hyper vigilant shooters will run a tiny wire drill bit into every tip, just to ensure that it is open. I won't be the one to test that practice, but I would imagine that if a guy wanted to buy and shoot these SMK on game, confirming all tips are open, or even opening them up just a little more could only help decrease the already seemingly slim possibility of bullet failure at terminal performance. You'd just want to confirm dope for those based upon whatever change there may be in BC by messing about with the tips.