10mm Underwood Extreme Penetrator vs Hardcast
Bear defense 10mm penetration testing with full power loads from Underwood ammo. Using a Glock 20 gen 4 with a 6" KKM barrel.
Bullet Design Details | Accurate Molds
Bullet Design Details | Accurate Molds
What is the melting temperature you run for a 95/5 mix of WW & Tin
- rlphvac
- Replies: 10
- Forum: reloading/bullet casting
if your realistically expecting to confront a bear at close ranges there are better options,than most handguns.. like a 375-458 caliber rifle!
or a 10ga or 12ga shotgun loaded with slugs, and yes your ammo maters.
there are seven states that now mandate "shotgun slugs only" either statewide, or in large areas. These are: Illinois, Indiana, Iowa, Ohio, Massachusetts, New Jersey, and Rhode Island. Then there are 15 more that have regional regs to the same effect: Alabama, Arkansas, Connecticut, Delaware, Florida, Maryland, Michigan, Minnesota, New Hampshire, New York, North and South Carolina, Pennsylvania, Virginia and Wisconsin. Moreover, two more states, Kentucky and Maine, will probably go the partial route, if not for this season, then in '97.
before hunting any area in any state carefully...
before hunting any area in any state carefully...
- grumpyvette
- Replies: 28
- Forum: shotgun related
your bullet alloy maters, generally you'll want a 18-22 hardness, wheel weights 82% antimony 13% and tin 5% works very well
95% wheel weights and 5% pure tin when the hot bullets are dropped directly from the mold into a 7 gallon bucket of cold water also works

Linotype Alloy - 5 pounds (4%-Tin, 12%-Antimony, and 84%-Lead)
sales@rotometals.com
but that facts not the same as saying a handgun can't produce lethal damage on a bear.
as properly loaded handgun is usually going to be considerably easier to carry over long distances,
in a proper holster than a rifle will be even with a sling , there's a Balance you'll need to find between power,
and ease of transport and use, and how effective the weapon you carry will be.
I watched the video above and it's almost sure to open your eyes in how difficult it can be to stop a bear with a hand gun.
(but the large bore revolvers do have a considerable advantage in penetration over most semi autos,)
and at the ranges your likely to be forced to engage and defeat a pissed off bear your unlikely to get more than a few shots off.
keep in mind the chances of your having to defend yourself is MINIMAL at best, most confrontations with predator's in the wild,
can be avoided, but it's best to be armed , well aware of your surroundings and well practiced in the use of your firearms!
personally I think a magnum revolver is ideal as your very unlikely to have the time to fire off more than 1-or 2 shots let alone 5-6 shots from any handgun,-every choice you make is ALWAYS, a compromise in several areas!
if your charged a quality revolver is dependable firepower and a 357-44-500 mag packs a decent punch
ITS AS ALWAYS DEPENDENT ON YOUR PERSONAL SKILL LEVEL.( AND EQUIPMENT CHOICES)
FAST EXPANDING HOLLOW POINT BULLETS ARE A BAD OPTION.
THINK PURE PHYSICS, THE HEAVIER THE MASS AND THE GREATER THE VELOCITY THE MORE IMPACT ENERGY, THAT'S POTENTIALLY TRANSMITTED TO THE TARGET, THE GREATER THE CROSS SECTIONAL AREA OF THE PROJECTILE THE MORE POTENTIAL PHYSICAL DAMAGE BUT THE MORE RESISTANCE TO DEEP PENETRATION THAT THE PROJECTILE MUST OVERCOME
every choice you make is ALWAYS, a compromise in several areas!
the ability to punch through bone and still penetrate through the vitals from several angles is a huge benefit,
thus the cartridges like the 445 DWSM,460 S&W, 480 ruger and 500 S&W with proper handloads,
are able to give added safety margins in deeper penetration,IF the operator is skilled and well practiced.
notice they stated they had a great many body hits fail to penetrate the bears vitals with the handgun ammo being used.,
yes both the 10mm and 44 mag have been successfully used to kill bears and successfully used in self defense
but as the larger revolvers cartridge power is increased (you have lots of options) and bullet mass increases, penetration usually increases dramatically.
new reloading manuals
I've got reloading manuals that date back to the late 1960s, all the way up to the newer ones, the older ones have far less detailed info and they may have older cartridges and powders listed new manuals don't ,but there's a bunch of newer cartridges not listed in older manuals, and there's a...
garage.grumpysperformance.com
simply because the projectile can't be effective if not placed where it can do the most damage.
you must also select a projectile designed to maximize results on its intended target thus you must know the intended targets anatomy and where the vitals are located internally, a bullet designed break bone and penetrate to the vitals on a large bear will zip through a human opponent, causing less than ideal internal damage, a bullet designed to max internal damage on a human opponent might expand far to rapidly on a BEAR! to ever reach the vitals!
but as always precise shot placement and a knowledge of bear anatomy is critical to rapid success.
445 dan wesson revolvers
YOULL NEED TO SHOOT A GREAT DEAL TO GET THE NECESSARY PRACTICE, its that frequent practice and hand loading that significantly reduces ammo cost, THAT MAKES THE 445 REALLY EFFECTIVE IN YOUR HANDS, CASTING YOUR OWN BULLETS SIZED EXACTLY TO THE THROAT/BORE SIZE HELPS, AS DOES THE COST SAVINGS...
garage.grumpysperformance.com
44 mag reload info
the 44 spc is over 115 years old its designed in 1907, to accurately throw a 240 grain bullet at about 760 fps from a 6"-7.5" original, barrel length revolver, with a max pressure level of 15,000 psi,thus its a bit less powerful in original factory loaded form that the more common originally...
garage.grumpysperformance.com
I was asked why I don't own a ruger 480 handgun?
I was asked why I don't own a ruger 480 handgun? there's always a balance to be found between how much recoil and muzzle blast you easily handle and your ability to hit a target easily, and consistently at ranges where your likely to use the handgun, for hunting it's been my experience that you...
garage.grumpysperformance.com
vs recoil levels and the potential accuracy and number of shots capacity and much of that is related to the level of practice & experience the operator has.

glock 20/10mm with aftermarket barrel for more effective cast bullet use generally noticeably improved accuracy with hard cast
,Id point out , after reading years of reports, two basic facts are obvious,
your chance of being attacked or mauled is very very low,
and if attacked ,that in most cases you'll be forced into a very close range confrontation ,
under a very limited amount of time on a fast moving attacker,
Id doubt you'll have time to place more than 3 shot's maximum,
and your life might depend on the results of a single hits lethal damage.
personally Id prefer the 44 mag revolver with a 300 grain hard cast bullet over 21 grains of H110 powder,
but I would certainly not feel defenseless if all I had was a 10mm pistol,
there are 180-200 grain hard cast bullet loads over about 10 grains of blue dot, have worked well on hogs, and deer
(CHECK YOUR LOAD MANUAL)
keep in mind no handgun has near the stopping power of a 12 ga slug,
or a 45/70 or 450 marlin with a hard cast 400 grain bullet
keep in mind its a knowledge of the opponents anatomy,
your skill at accurately placing shots under stress,
and precise shot placement more than power or magazine capacity,
that makes ALL the difference
below some vaguely related videos
10mm vs. .41 magnum for Bears
Note: We were shooting at a safe range with a safe backstop. Please do not try this at home. We are not advocating the sale of these firearms or ammunition. ...
and if its properly loaded with heavy hard cast gas check bullets,
has a noticeable power advantage over a 10 mm handgun
consider the fact that your very un-likely to have time to get off more than 2-3 shots in a bear defense situation, a 41-44 mag revolver seems to potentially hold some advantages over a larger capacity 10mm semi auto.
yeah its mentally comforting to have a 15 shot mag capacity,
but only hits to the vitals count in stopping a bear attack!
below some 44 mag related info, notice hard cast 44 mag revolvers far out perform the typical 10mm,
but realistically if your going to be shooting in a defensive confrontation,
you'll be lucky if you can get off more than 2-3 reasonably well aimed shots,
so magazine capacity .
while mentally it might be comforting its all but meaningless under real conditions.
as a defensive cartridge a 10mm is in my opinion close to ideal for a human opponent,
but it is certainly a bit less effective on a bear that might be significantly larger and much more heavily muscled.
I recently read of a fishing guide that carried a glock 10mm,
who was mauled and killed in ALASKA ,
they found he never got off a shot because,
he had never chambered a cartridge,
and he died with a full magazine.
witnesses stated he was attacked at very close range ,
unexpectedly , he drew his pistol but never got off a shot
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