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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6 mm Rem. Loads??
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<blockquote data-quote="Trickymissfit" data-source="post: 725078" data-attributes="member: 25383"><p>It's kinda like this. Originally Remington felt that the 6mm was a true long range varmit round, and most bullets at the time were under or near 100 grains, but with fairly low ballistic coefficients. On the otherhand Winchester went with a fast twist barrel to make it stabalize 100 grain bullets, but for the time they overstabalized it. Well somebody at some gun shop with a third grade education decided that a 1:12 barrel (or maybe 1:11) was gonna do the 90 thru 100 grain bullets. But actually the slow twist will stabalize 80% of the 90 grain bullets to the point that they are good enough for deer hunting. (Mike Ventureo did a bunch of testing on this issue many years ago). For most bullets I've long felt the 1:9 was a little too fast, and perhaps a 1:10 might have been a little better. Then along comes the Hornaday Amax and some Bergers that were very marginal in a 1:9 barrel. I have learned in my old age that there was more to it than the twist rate. The throats had a lot to do with making a high B/C work in the 1:9 barrel. The throat in my 6/250AI is cut for the Sierras and the Amax, and add that to a 1:8 barrel we see a world of difference. I honestly think it was the combo of the two. Which leads us back to the .244 / .243 discussion. Remington throated their barrels for mid range bullets like the 85 grain Hornadays of the time, but Winchester did the throat that was kinda generic in that it was a comprimise for the whole 6mm spectrum. Yet still better with 100 grain bullets. If you look in an older manual you will notice that the highest B/C in a 6mm was about .40 (BTSP) yet the other two are .35 and .24. A lot of people every year shot their deer with the 87 grain bullet not realizing that if that bullet shot well in the slower twist the 100 grain bullet (.357 B/C) would do just as well. But when they went to shoot P.D.'s at 500 yards with the other using 70 grain bullets they didn't do so great; while the guy with the .244 was shooting light's out. Plus the generic Winchester .243 is one of the worst factory designed cartridges ever sold</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 725078, member: 25383"] It's kinda like this. Originally Remington felt that the 6mm was a true long range varmit round, and most bullets at the time were under or near 100 grains, but with fairly low ballistic coefficients. On the otherhand Winchester went with a fast twist barrel to make it stabalize 100 grain bullets, but for the time they overstabalized it. Well somebody at some gun shop with a third grade education decided that a 1:12 barrel (or maybe 1:11) was gonna do the 90 thru 100 grain bullets. But actually the slow twist will stabalize 80% of the 90 grain bullets to the point that they are good enough for deer hunting. (Mike Ventureo did a bunch of testing on this issue many years ago). For most bullets I've long felt the 1:9 was a little too fast, and perhaps a 1:10 might have been a little better. Then along comes the Hornaday Amax and some Bergers that were very marginal in a 1:9 barrel. I have learned in my old age that there was more to it than the twist rate. The throats had a lot to do with making a high B/C work in the 1:9 barrel. The throat in my 6/250AI is cut for the Sierras and the Amax, and add that to a 1:8 barrel we see a world of difference. I honestly think it was the combo of the two. Which leads us back to the .244 / .243 discussion. Remington throated their barrels for mid range bullets like the 85 grain Hornadays of the time, but Winchester did the throat that was kinda generic in that it was a comprimise for the whole 6mm spectrum. Yet still better with 100 grain bullets. If you look in an older manual you will notice that the highest B/C in a 6mm was about .40 (BTSP) yet the other two are .35 and .24. A lot of people every year shot their deer with the 87 grain bullet not realizing that if that bullet shot well in the slower twist the 100 grain bullet (.357 B/C) would do just as well. But when they went to shoot P.D.'s at 500 yards with the other using 70 grain bullets they didn't do so great; while the guy with the .244 was shooting light's out. Plus the generic Winchester .243 is one of the worst factory designed cartridges ever sold gary [/QUOTE]
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6 mm Rem. Loads??
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