sconnierider
Active Member
It's all fodder to help us justify buying a rifle in a new platform. Count me in!
Funny thing two years ago I hunted moose in Finland.I saw a higher percentage of 308 and 30/06s being used then by any 6.5 cartridge.I asked why and was told because 308 diameter bullets put moose down faster.Second was 9.3X57 or 9.3X 62.Go figure?
If you look at a ballistics chart, the BC of a 6.5 bullet is higher than every other caliber bullet across all calibers except for the heaviest 30 and 338 caliber bullets
Problem with the large majority of 270 Winchester's is that none of them have the twist rate to stabilize any of those high BC bullets unless twist rates have tightened up in the last few years.I see no real reason other that marketing in order to sell more new stuff!! Nothing wrong with that !!! The .270 150 Grn Nosler LR has a G 1 BC of 625/G 7 BC of 317. the 170 grn. Berger in 270 has an even higher G 7 BC. The case capacity of the new 6.5 PRC is greater that the case capacity of the 6.5 Creedmore and approaches the case capacity of the .270 Win. The 6.5 X 284 has almost the same case capacity as the .270 Win. so . Compare .264 vs .277. 6.5mm 143 Grn with a G 7 BC of 315 vs .270 with a 150 grn. with a G7 BC of 0f 317. It seem they are trying tp make a .270 Win, without calling it a .270 Win!!! I have built an 8 twist heavy Barrell .270 Win, and in first testing show excellent 300 yard 1/3 moa groups with the 150 Grn Nosler Accubond LR. Much more testing to do in the spring.
Right. The bore diameter won't influence BC or SD. The more popular calibers or calibers that are traditionally long range calibers will have better selection in bullets with high BC.You might want to actually look at the available bullets (probably not a ballistics chart) before making that assumption.
For example, I am unaware of a 6.5 bullet with a G1 BC greater than the 7mm Berger 195 EOL with a G1BC of .755
My target gun has a 29 inch Heavy hart barrel with an 8 twist to make use of the long , skim heavy 270 Bullets. I hopeProblem with the large majority of 270 Winchester's is that none of them have the twist rate to stabilize any of those high BC bullets unless twist rates have tightened up in the last few years.
Notice I said most, which honestly implied the factory market, and not your custom barreled rifle. Custom rifles will never drive the market, normal consumers will, and the normal consumer's 270 Winchester doesn't have the twist rate needed.My target gun has a 29 inch Heavy hart barrel with an 8 twist to make use of the long , skim heavy 270 Bullets. I hope
I see your point and I agree with that . Two of my .270 Win hunting rifles have a 10 twist. I'm not sure about the twist my 270 Weatherby Mag Mark V , New in 1973. It shoots 150 Grain bullets pretty good, but I have never tried the 150 grn Accubonds LR in that rifle.Notice I said most, which honestly implied the factory market, and not your custom barreled rifle. Custom rifles will never drive the market, normal consumers will, and the normal consumer's 270 Winchester doesn't have the twist rate needed.
6.5 bullets vs 270,284,308. Why has the 6.5 taken off and if you believe the hype - taken over? I have been sucked into the hype with one 6.5 PRC with a second to follow. Is it just bullet type and availability? The 270 bullets just can't keep up because they don't exist yet? The 284 must be heavy for caliber like the 308 to compete with the 6.5? Why why why is the 6.5 the new "King"?
Just wondering....