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Big max rcbs ram pressure12/3/2023 This allows you to develop literally tons of pressure without the usual concern about press frame deflection or misalignment. ![]() 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. “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. For maximum sensitivity at the lowest possible leverage, priming is done at the end of the ram stroke. Spent primers are automatically collected in the large diameter hollow ram. ![]() 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. 45-70 cases, some may feature a deeply rolled cannelure. It was done when the case was made, not after it was loaded as was more common. It allowed the base of the old 400-grain softpoint to "perch" to avoid being deep-seated by recoil in a tubular magazine. 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. Fortunately, the company that did this has seen the light and eliminated this superfluous feature from its unprimed. People have built tools to remove this cannelure, but I find it as easy to fire-form the cannelure out of the way. 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. 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. When new rifles appeared in the second half of the 20th century, jacketed bullets were the norm, and rifling reflected that. Barrels were mostly button-rifled (swaged) with a multi-groove pattern having shallow grooves. 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. 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. You will probably find that loading a little lighter helps the bullet stay in good contact with the rifling. ![]() Plinking loads in the 1,200- to 1,400-fps range will usually not stress cast bullets regardless of the rifling style. Like many straight-wall cases that evolved during the blackpower days, the. 45-70 excels with many of the propellants you would load in the. If you're loading light, keep an eye on airspace. 45-70 is not too picky, but very low-volume propellant charges may show larger ballistic variations than you want.
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