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45 ACP on Brown Bear.????
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<blockquote data-quote="436" data-source="post: 2567357" data-attributes="member: 16609"><p>I don't disagree that the .45 ACP is a great cartridge, I used one for many years on and off the job, it's still my go-to caliber for 90% of anything that goes bump in the night. Today my .45 ACP carried with Underwood +P 200gr solid monolithic Xtreme penetrator or Remingtons 230gr Golden Saber HP But... as big Bear goes I take my G20SF with Underwood 200gr +P solid monolithic Xtreme penetrator, I digress. I think the real answer here, between the .45 caliber and the 10mm (pistols) because velocity matters, is the sectional density with each of the bullets in the same weight, yet at a different or the same velocity, e.g. I can't push a 200gr .45 ACP +P faster then I can a 10mm +P </p><p>Small diameter, same weight, at the same or high velocity in this case the 10mm SDs small diameter will always penetrate better, which I believe has been demonstrated many times. So the key references may well be sectional density in the conversation. It can be deceiving because the .45 caliber with heavy bullets can have higher SDs... but... from a .45 ACP with a much, much low velocity... which is kinda is self-defeating in the long run. So trying to stay with; apples and apples, I'd think the 10mm has the edge in the ballistic penetration, by quite a bit and then some. I used solid monolithic because of explanation again will change the outcome on both the .45 cal and 10mm bullet choice, as to the depth of penetration. </p><p></p><p></p><p>Sectional Density is the ratio of an object's mass to its cross-sectional area with respect to a given axis. It conveys how well an object's mass is distributed to overcome resistance along that axis. </p><p></p><p></p><p><strong>.45 caliber (.451-.452")</strong></p><p></p><ul> <li data-xf-list-type="ul">185 grain, SD .130 ****</li> <li data-xf-list-type="ul">200 grain, SD .140 ****</li> <li data-xf-list-type="ul">225 grain, SD .158</li> <li data-xf-list-type="ul">230 grain, SD .162</li> <li data-xf-list-type="ul">250 grain, SD .175</li> <li data-xf-list-type="ul">260 grain, SD .183</li> <li data-xf-list-type="ul">300 grain, SD .210</li> </ul><p><strong></strong></p><p><strong>.40 / 10mm caliber (.400")</strong></p><ul> <li data-xf-list-type="ul">155 grain, SD .138</li> <li data-xf-list-type="ul">165 grain, SD .147</li> <li data-xf-list-type="ul">180 grain, SD .161 ****</li> <li data-xf-list-type="ul">200 grain, SD .179 ****</li> </ul><p>As always just my 0.2 Cheers.</p></blockquote><p></p>
[QUOTE="436, post: 2567357, member: 16609"] I don't disagree that the .45 ACP is a great cartridge, I used one for many years on and off the job, it's still my go-to caliber for 90% of anything that goes bump in the night. Today my .45 ACP carried with Underwood +P 200gr solid monolithic Xtreme penetrator or Remingtons 230gr Golden Saber HP But... as big Bear goes I take my G20SF with Underwood 200gr +P solid monolithic Xtreme penetrator, I digress. I think the real answer here, between the .45 caliber and the 10mm (pistols) because velocity matters, is the sectional density with each of the bullets in the same weight, yet at a different or the same velocity, e.g. I can't push a 200gr .45 ACP +P faster then I can a 10mm +P Small diameter, same weight, at the same or high velocity in this case the 10mm SDs small diameter will always penetrate better, which I believe has been demonstrated many times. So the key references may well be sectional density in the conversation. It can be deceiving because the .45 caliber with heavy bullets can have higher SDs... but... from a .45 ACP with a much, much low velocity... which is kinda is self-defeating in the long run. So trying to stay with; apples and apples, I'd think the 10mm has the edge in the ballistic penetration, by quite a bit and then some. I used solid monolithic because of explanation again will change the outcome on both the .45 cal and 10mm bullet choice, as to the depth of penetration. Sectional Density is the ratio of an object's mass to its cross-sectional area with respect to a given axis. It conveys how well an object's mass is distributed to overcome resistance along that axis. [B].45 caliber (.451-.452")[/B] [LIST] [*]185 grain, SD .130 **** [*]200 grain, SD .140 **** [*]225 grain, SD .158 [*]230 grain, SD .162 [*]250 grain, SD .175 [*]260 grain, SD .183 [*]300 grain, SD .210 [/LIST] [B] .40 / 10mm caliber (.400")[/B] [LIST] [*]155 grain, SD .138 [*]165 grain, SD .147 [*]180 grain, SD .161 **** [*]200 grain, SD .179 **** [/LIST] As always just my 0.2 Cheers. [/QUOTE]
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