Option: # 4 (4) Option: # 5 (3) Option: # 6 (12) … Today's Deals. Contact Us. Look at speeds in ratios then for a relative measurement (auto speed/over under speed). var addy_text1b20d3ca2404989bd33174637d096b39 = 'tomroster' + '@' + 'charter' + '.' + 'net';document.getElementById('cloak1b20d3ca2404989bd33174637d096b39').innerHTML += ''+addy_text1b20d3ca2404989bd33174637d096b39+'<\/a>'; For example shoot 5 fast powder shells through the O/U and then the auto through the chronograph. Because of the size of the bore, the relative thinness of shotgun barrels and the velocity restriction most shot shells run around 8,000 to 9,000 psi in the 12 ga. ... Why is it that older lever actions can take low-pressure and high-power rounds like the 12 gauge and .45-70 but cannot take lower power, higher pressure rounds like modern rifle cartridges? First have your Parker examined by a competent gunsmith to verify the integrity of the barrels.Damascus barrels might appear to be good with the naked eye yet have flaws due to rust pockets that have formed over the years.If the gunsmith verifies the barrels you can then consider using some blackpowder loads.Make sure that your shotgun is bored for two and three quarter inch shells and not two and five eights which alot of the eairly shotguns had.Under no circumstances use any type of smokless powder.The preasure curves on smokless powder Are much to great for damascus barrels and they will let go just about the forearm of the shotgun.In the event that the barrels are determined to be faulty have your gunsmith refinish the barrels to bring out the patterns and you will have a masterpiece to hold and admire. Shotshell pressures seem to be a worrisome area for many shotgunners, especially reloaders. I once embarked under contract to Remington on a destructive testing regimen to determine how much pressure had to be developed in a Remington Model 870 12-gauge barrels chambered for 3-inch shells before they would explode. When the propellant is … CIP pressure standard for 12 gauge non-magnum shotgun loads is a little lower than SAAMI spec. NES Member. A forum community dedicated to the great outdoors and hunting enthusiasts. While this pressure is somewhat higher than the norm for black powder, it is still miles below the standard 10,000-plus psi for most modern shells here in the United States. Replicates European field loads for the short-chambered shotguns. Get some reduced gauge tubes and enjoy the gun . Obstructions can take the form of lodged wads, plugs of snow or mud, etc., and are notorious for causing barrel bursts if they are not cleared before a following fresh round is fired. The barrels are really solid and I would like to... Graybeard. Check With Your Local Ammo Store For Availability Shot Size: 6; Shot Charge Oz: 11/16; Type: Lead; Package Quantity: 25; Usage: Upland; Compare. 209A Reloading 12 ga shotgun shells with black powder for cowboy action shooting using common hardware store items. Also, make shure the chamber length is ascertained. There is special low pressure load data that produces loads with one third to one quarter the normal pressure even with selected smokeless powders and there are companies who specialize in producing such low pressure loads. MENU; Login; Posts. They ran into a touch of trouble. RST, since they specialize in low pressure shells for vintage guns, test their products for low temperature performance since hunting in cold weather is a part of their intended use.
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