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Rifles, Reloading, Optics, Equipment
Reloading
Glock 10mm bear loads
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<blockquote data-quote="esorensen" data-source="post: 1741172" data-attributes="member: 4302"><p>Let me begin by saying that I don't own a 10mm. I do shoot hard cast bullets in a .40 S&W HK USP. The 200 gr Beartooth bullets moving at 1000 fps have no issue penetrating bull elk from different angles. The performance keys in cast projectiles come down to a few points. </p><p></p><p>First is nose profile. A wide flat nose makes and maintains the largest holes. The more pointed the projectile, the smaller the hole. Think of a hole punch for paper, and you get an idea of wound channel configuration. The permanent wound cavity looks like it was bored through an animal with a drill bit. Bone, muscle, whatever, has a caliber sized hole going through it. These are not LR projectiles and BC isn't a concern. </p><p></p><p>Second is that lubed lead makes less bore friction, so more speed can be had vs a jacketed same weight counterpart. This is good and bad. More speed can and often equals more barrel leading. This is a negative trait. The good news is severalfold. Speed is NOT what makes hard cast penetrate so well. In fact I've seen the opposite. Keeping these square profiled bullets below the speed of sound gets better accuracy and decreased bullet deformation on target, and maintains ridiculous penetration in a very straight wound profile. Hard cast bullets with a gas check will almost wipe any left over lead out of the bore, so its really a win-win. Pointed bullets often exhibit a terminal ballistic yaw. I've yet to see that happen with hard cast. Wound channels are dowel rod straight and consistent shape and size. Whatever trajectory it starts at is where it ends up.</p><p></p><p>Obtaining the highest velocities like we attempt for in our rifles is not what I've found to be the "best". Finding the heaviest bullet that will stabilize and moving it as accurately as possible around the 1000-1100 fps range is perfect in my opinion and observations. Heavy and slow. This is what I've found to be the penetration key in my experience. If you think of the accurate bullseye type .38 loads and wadcutter bullets, you get an idea of what makes it accurate and how it cuts a hole. The .44 329PD with 280's at 1100 fps I also use is plenty of everything for anything.</p></blockquote><p></p>
[QUOTE="esorensen, post: 1741172, member: 4302"] Let me begin by saying that I don’t own a 10mm. I do shoot hard cast bullets in a .40 S&W HK USP. The 200 gr Beartooth bullets moving at 1000 fps have no issue penetrating bull elk from different angles. The performance keys in cast projectiles come down to a few points. First is nose profile. A wide flat nose makes and maintains the largest holes. The more pointed the projectile, the smaller the hole. Think of a hole punch for paper, and you get an idea of wound channel configuration. The permanent wound cavity looks like it was bored through an animal with a drill bit. Bone, muscle, whatever, has a caliber sized hole going through it. These are not LR projectiles and BC isn’t a concern. Second is that lubed lead makes less bore friction, so more speed can be had vs a jacketed same weight counterpart. This is good and bad. More speed can and often equals more barrel leading. This is a negative trait. The good news is severalfold. Speed is NOT what makes hard cast penetrate so well. In fact I’ve seen the opposite. Keeping these square profiled bullets below the speed of sound gets better accuracy and decreased bullet deformation on target, and maintains ridiculous penetration in a very straight wound profile. Hard cast bullets with a gas check will almost wipe any left over lead out of the bore, so its really a win-win. Pointed bullets often exhibit a terminal ballistic yaw. I’ve yet to see that happen with hard cast. Wound channels are dowel rod straight and consistent shape and size. Whatever trajectory it starts at is where it ends up. Obtaining the highest velocities like we attempt for in our rifles is not what I’ve found to be the “best”. Finding the heaviest bullet that will stabilize and moving it as accurately as possible around the 1000-1100 fps range is perfect in my opinion and observations. Heavy and slow. This is what I’ve found to be the penetration key in my experience. If you think of the accurate bullseye type .38 loads and wadcutter bullets, you get an idea of what makes it accurate and how it cuts a hole. The .44 329PD with 280’s at 1100 fps I also use is plenty of everything for anything. [/QUOTE]
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Glock 10mm bear loads
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