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Mensaje: <blockquote data-quote="Delfin" data-source="post: 778668" data-attributes="member: 2582">Comparativa entre el .38 Special y el .380 ACPHola!Reiteramos nuestra maldición gitana para el software de ZM que no permite hacer o incorporar TABLAS! :boxing_smiley: grrrrrr" me hace el favor , tengo una pregunta. Aqui mucha gente les gusta llevar los revolveres de 5 tiros, el "frame" es reducido, los que le llaman "J frames", creo que esa nomenclatura se las dio la fabrica Smith & Wesson, de calibre .38 especial. Tengo entendido que ese calibre no es tan bueno como el .380." Trataré de responderte en base a... las famosas tablas de Marshall y ShanowLo que siguen son valores tomados de las famosas tablas de STOPPING POWER de Marshall y Shanow (de los cuales algún día hablaremos con más detalle) Los promedios los he calculado yo (tranqui... soy docente de Informática :rofl:)Arma y Calibre – Type – Grains – Velocity (fps) – Energy (fpe) – Success %38 Special 2" – Promed – 135 – 811 – 194 – 111 - 59%38 Special 4" – Promed – 118 – 1108 – 296 – 107 - 73%Arma y Calibre – Type – Grains – Velocity (fps) – Energy (fpe) – Success %.380 ACP – Promed – 82 – 1122 – 222 - 66%¿Cómo se interpreta esto? La cosa es más o menos así. El valor de 80% de “SUCCESS” se puede tomar como ACEPTABLE, esto es: un 80% significa que en 8 de 10 casos que una única bala impacta en el TORSO de un agresor armado, se logra la INCAPACITACIÓN más o menos inmediata (cuestión de segundos)Ninguno de los tres -en PROMEDIO- sirve para defensa personal.Si nos fijamos en los valores del .38 Special disparados desde revólveres de 2” de cañón veremos que el promedio de ÉXITO (“success”) es de sólo 59%, un valor inaceptable para uso en Tiro DefensivoEn cambio el .38 Special pero disparados desde revólveres de 4” dan valores de promedio de 73% esto ya estaría un poco más cerca del 80% tomado en forma arbitraria para justificar su uso.Es decir: el factor MÁS LIMITANTE es el largo del cañón, más que el calibre en sí.El .380 ACP se halla entre ambos. Es MEJOR que el .38 Spc cuando se dispara desde revólveres con cañón de 2” y es PEOR que el .38 Spc cuando se dispara desde revólveres con cañón de 4”Un detallecito… para el calibre .380 ACPManufacturer – Brand – Type – Grains - Velocity (fps) - Energy (fpe) - SuccessMagsafe - Maximum +P+ - JPF – 52 – 1720 – 342 - 81%Una sugerencia:  si tenés que usar revolver de 2"... comprate uno en calibre .357 Magnum. Ejemplo el Mod 617 de TAURUS que tiene capacidad para 7 tiros, 5 es muy poco... <a href="http://www.taurususa.com/product-details.cfm?id=253&category=Revolver&toggle=&breadcrumbseries">http://www.taurususa.com/product-details.cfm?id=253&category=Revolver&toggle=&breadcrumbseries</a>=<img src="http://www.taurususa.com/images/imagesMain/617B.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />O bien el Modelo 650, también en .357 Mag en acero inox. de 5 tiros y martillo oculto ( <a href="http://www.taurususa.com/product-details.cfm?id=267&category=Revolver&toggle=&breadcrumbseries">http://www.taurususa.com/product-details.cfm?id=267&category=Revolver&toggle=&breadcrumbseries</a>=)<img src="http://www.taurususa.com/images/imagesMain/650B.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />-------------- STOPPING POWERWhere no shootings have occurred, the effectivness has been estimated using Marshall and Sanow's techniques. Actual street figures are shown first, followed by estimates. All figures sorted according to effectiveness.Information Sources: All figures listed under the Marshall & Sanow's Latest Ratings are sourced from the references listed below. Because the database of actual shootings, and the number of new ammunition & bullets being released is continually increasing, a situation occurs where different sources list conflicting figures for the same calibre/load combination. When this occurs, I have used the figures from the most recently dated publication. Many thanks to the following publications, people, and organisations for the actual figures, and much of the information about handgun stopping power provided by this site:FBI Wound Ballistic EvaluationFederal Cartridges (Product info and brochures)Guns & Ammo Magazine (September 1992)Guns & Ammo Magazine (October 1992)Guns & Ammo 1994 Annual for the Strasbourg Test InformationHandguns Magazine (February 1995)Handguns Magazine (December 1995)Hornady 1995 Catalog (Pictures)Handgun Stopping Power (Marshalll & Sanow) for most of the figures and background informationLarry Ellision for pointing out errors, for constructive criticism, and useful suggestions.Magsafe Ammo Company (Product info and brochures)Marshalll & Sanow for all their fantastic work, and regular updatesRick Dixon (D&D Omega Star Bullets) for figures, photo's, bullets and other interesting informationStreet Stoppers (also by Marshall & Sanow)Criteria for Determining a Bullets Stopping Power[Marshall and Sanow, pages 43-45]The bullet must strike the torso (excluding the head and neck) of a person. It seems obvious that a bullet that strikes a hand, leg, arm or foot, will almost certainly never bring about instantaneous incapacitation. Secondly, a successful one-shot stop occurring in the neck or head owes its success to shot placement, rather than calibre or bullet design.Multiple hits have to be discarded. We are interested in the effect of a single bullet. Again it is obvious that multiple shots will be more effective, however it is impossible to determine some measure of bullet performance based on multiple shots.Figures are provided (by Marshall & Sanow) only when a minimum of five instances of shooting with a particular load/calibre combination have occurred. In addition, some of the following information must have been available: police reports, evidence technician reports, homicide reports, autopsy results, and photos (among other things). In addition, the actual recovered bullets or photographs of the bullets must have been available for examination.Marshall & Sanow have developed a method of estimating a bullets performance based on correlating the results of the performance of new bullets fired into 10% ballistic gelatine with the results of bullets with known performance on the street, also fired into 10% ballistic gelatine. (Read the book - you'll find out that their method of estimating is the most thorough and likely to represent reality as you could possible get). All figures that are estimated are marked with a "*". Reality shows that frequently the estimated figure turns out to be a little below the actual figure when it becomes available.Validity of the Bullet Effectiveness Estimation Theory[Marshall and Sanow, pages 187-196]Marshall and Sanow make use of four areas of a bullets performance in 10% ballistic gelatine to predict a bullets effectiveness. In each case the bullets known performance on the street is compared to the performance in the ballistic gelatine. The results allow a new bullets street effectiveness to be estimated based on its performance in ballistic gelatine. The correlation coefficients for each area of bullet performance in ballistic gelatine with actual street results are:Penetration. The correlation coefficient for penetration is -0.37. Recovered bullet diameter. The correlation coefficient is 0.82 for bullets under 1300 fps, and 0.68 for bullets over 1300 fps. Permanent crush cavity volume. The correlation coefficient is 0.87 for bullets under 1300 fps, and 0.60 for bullets over 1300 fps. Temporary crush cavity volume. The correlation coefficient is 0.80. Of course, the closer each correlation coefficient is to 1.0, the more accurate the prediction. In practise, Marshall and Sanow's method has shown itself to be very accurate, and has become the standard by which many bullet manufacturers and knowledgeable publications compare and estimate new bullets performance. - All rights reseved by Marshall and Sanow Abrazos!</blockquote>

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