4/4/2023 0 Comments Big max rcbs ram pressure![]() 45-70 is not too picky, but very low-volume propellant charges may show larger ballistic variations than you want. If you're loading light, keep an eye on airspace. 45-70 excels with many of the propellants you would load in the. Like many straight-wall cases that evolved during the blackpower days, the. Plinking loads in the 1,200- to 1,400-fps range will usually not stress cast bullets regardless of the rifling style. You will probably find that loading a little lighter helps the bullet stay in good contact with the rifling. ![]() ![]() If you have a rifle with the shallow groove pattern and want to shoot cast bullets, the only workable out that seems effective is to cast the bullets very hard-linotype hardness seems to work best. They shot great with jacketed bullets but often failed to accurately shoot cast lead bullets.Ĭowboy action shooting has influenced many riflemakers to revert to "cut" rifling with a pattern that works well with either jacketed or cast lead bullets. Barrels were mostly button-rifled (swaged) with a multi-groove pattern having shallow grooves. When new rifles appeared in the second half of the 20th century, jacketed bullets were the norm, and rifling reflected that. 45-70 started as a lead-bullet cartridge, and old barrels were rifled with a pattern of lands and grooves aggressive enough to engage fairly soft lead. I load either an Ideal 300-grain or an RCBS 325-grain cast bullet with a modest charge of IMR-4759 or Accurate Arms 5744 the cannelure irons out nicely with little additional stress to the case. People have built tools to remove this cannelure, but I find it as easy to fire-form the cannelure out of the way. Fortunately, the company that did this has seen the light and eliminated this superfluous feature from its unprimed. If you loaded a bullet that sat deeper in the case than the factory bullet, you quickly found that the cannelure stopped the bullet as effectively as a steel plate. It allowed the base of the old 400-grain softpoint to "perch" to avoid being deep-seated by recoil in a tubular magazine. It was done when the case was made, not after it was loaded as was more common. 45-70 cases, some may feature a deeply rolled cannelure. They then drop into a handy flexible plastic tube that can hold hundreds of spent primers before emptying, or be easily routed to your trash container.If, like me, you have a stash of older. Spent primers are automatically collected in the large diameter hollow ram. For maximum sensitivity at the lowest possible leverage, priming is done at the end of the ram stroke. “Smart” primer arm automatically swings into position during the ram stroke and flips out of This makes “childs play” of difficult case forming operations.īuy the Kit, Save 25% on Dies and ShellholderĪlso available in kit form: Includes press, shellholder, and your choice of any Series “A” full length die set.įor Order No., replace XXX with the last three numbers from the Series A chart Its unique long link compound leverage system has more mechanical advantage over a greater distance than any other reloading press on the market. The ULTRAMAG features a huge 4-3/4” frame opening and 4-1/8” of usable ram stroke, making it ideal for loading oversized cartridges such as the old Sharps “Buffalo Cartridges” and British “Nitro- Express” rounds. This allows you to develop literally tons of pressure without the usual concern about press frame deflection or misalignment. Unlike other reloading presses which connect the linkage to the lower half of the press, the ULTRAMAG’S leverage system is connected to the top of the press frame. 148Īt first glance you will see what sets the ULTRAMAG apart from all other reloading presses: the unique location of its compound leverage system. “The largest and strongest press available for the toughest reloading chores…” - HANDLOADER Magazine, No.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |