Reloading 101, #2 Powder Selection. 15 396 просмотров 15 тыс. просмотров. Reloading 101 #4, Low Powder Charge Danger? • Powder Temperature Sensitivity For Long Range Precision Rifle Loads.
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One of the unsung features if H4198 is unlike the majority of other (ball) powders for this caliber, it is temperature compensated, extruded powder. Loads developed at a comfortable 70 deg, will not be much different in velocity when fired at say, 30 degrees during hunting season. Every ball powder I've used exhibits sensitivity to temperature.
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Jun 05, 2011 · Black powder loads have a different pressure curve than smokeless, where the chamber pressures run VERY high (in the 8,500 to 11,500 psi range, compared to the 5,500 to 6,000 psi range for black powder loads. Nitro powders today in the US are "progressive burning" and bear no resemblance to the powders in your referenced data.
Temperature-sensitive mutants are variants of genes that allow normal function of the organism at low temperatures, but altered function at higher temperatures. Cold sensitive mutants are variants of genes that allow normal function of the organism at higher temperatures...This powder is obviously a little SLOW to be using in the pistol. His velocity gains after 5.5-5.6 grains started getting erratic; meaning, unburnt powder was exiting the muzzle sometimes. In the PS90 length barrel, this powder is still gaining strength (pressure) WELL down the bore. (It *is* a burn rate suitable for 12 gauge shotguns, after all).
Powder "burn" is a chemical reaction and is inherently affected by temperature. I would like to see an explanation of the "reverse temperature sensitivity" reported for some Ball powders, it does not fit the physical chemistry.Why does temperature sensitivity matter? If you've never read up on the effect temperature can have on reloading, here's a brief look, and then Just how much does an increase in temperature affect the powder burning-rate? Some powders are more susceptible to temperature effects than others...Alibaba.com offers 870 temperature sensitive dyes products. About 0% of these are Hair Dye. A wide variety of temperature sensitive dyes options are available to you, such as classification, feature, and technics.
Reloading Powders. Add to Wishlist. Add to cart. Alliant Promo – 8 lb $ 159.99. Out-of-Stock. Add to Wishlist. Read more. IMR White Hots Black Powder Substitute 50 ... Jan 01, 2020 · Saw some Ramshot powders there and looked at them all and decided to give HUNTER a try. The can says its similar in burn rate to 4350 but several burn rate charts I looked at show it a bit slower, more like R19 or IMR4831.
Cold weather does lower powder function.Often you need magnum primers in extremely cold conditions and fps will be lower.As jimkin stated,someone got it backwards.In the NRA Firearms Fact Book it states "For the IMR powders,'each change of temperature of 1 degree F. changes the muzzle velocity by 1.7fps in the same direction." Mar 27, 2016 · These powders have performed great, and I love the fact that copper de-fouling is “built in”. There’s a new crop of powders from IMR that feature copper de-fouling plus extreme temperature stability (great performance over a wide range of temperatures), and “green” (environmentally responsible) production.
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Feb 20, 2015 · RL-15 powder and .308 accuracy loads. This is a discussion on RL-15 powder and .308 accuracy loads within the Handloading Techniques forums, part of the Technical category; RL15 IS temperature sensitive. I chrono'd a load in May and the same load (from the same batch) and got a velocity increase of 56fps. ... Flame temperature is very close to the same for all smokeless powders and runs about 3300 degrees F. Ball type powders tend to be from 3200 to 3300 degrees F and extruded powders tend to run 3300 to 3400 degrees F but there is wide variation.
IMR has come out with some new powders like IMR-4451,IMR-4166 and IMR-7977 and they are temperature resistant. On Hodgdon burn chart IMR-4451 is right between IMR-4350 and H-4350 with IMR-4350 being the fastest.