This load (item 3H) is "standard pressure" and is safe for use in any/all firearms chambered in 45 Colt and/or 454 Casull. The "over-all-length" is 1.572 inches and is short enough to be fired in and fed through any/all 45 Colt firearms.#html-body [data-pb-style="62DF82882F51D"]{justify-content: flex-start; display: flex; flex-direction: column; background-position: left top; background-size: cover; background-repeat: no-repeat; background-attachment: scroll; border-style: none; border-width: 1px; border-radius: 0px; margin: 0px 0px 10px; padding: 10px;}#html-body [data-pb-style="62DF82882F52A"]{border-style: none; border-width: 1px; border-radius: 0px; margin: 0px; padding: 0px;}