24-06-2010, 12:47 PM
Jeg har lidt de samme grublerier og tror det relaterer til den 1:10 twist der er i min 30.06'er [
]
Her lidt udenlandsk input om barrel twist og projektilvægt. Taget ud af en anden (.308W vs 30.06) sammenhæng meeen måske brugbart:
* Another reason is barrel twist. .30-06 barrels standardized on a 1:10
twist in the early 1900s. That is way too fast for best accuracy with
150 to 180 grain bullets they mostly used. A 1:12 twist would have been
much better but folks didn't understand that at the time. With the .308
having 1:12 or 1:11 twists, their slower-velocity bullets were perfectly
stabilized and they shot smaller groups. Only with 200-grain bullets
did the .30-06 hold its own, but they had to shot with maximum charges
and that meant recoil started getting difficult to consistantly manage.
Kilde: http://yarchive.net/gun/ammo/308_vs_30-06.html
Mvh Peter
################
Howa 1500 30.06
]Her lidt udenlandsk input om barrel twist og projektilvægt. Taget ud af en anden (.308W vs 30.06) sammenhæng meeen måske brugbart:
* Another reason is barrel twist. .30-06 barrels standardized on a 1:10
twist in the early 1900s. That is way too fast for best accuracy with
150 to 180 grain bullets they mostly used. A 1:12 twist would have been
much better but folks didn't understand that at the time. With the .308
having 1:12 or 1:11 twists, their slower-velocity bullets were perfectly
stabilized and they shot smaller groups. Only with 200-grain bullets
did the .30-06 hold its own, but they had to shot with maximum charges
and that meant recoil started getting difficult to consistantly manage.
Kilde: http://yarchive.net/gun/ammo/308_vs_30-06.html
Mvh Peter
################
Howa 1500 30.06