Garandimal
member
All my .270 WCF's are scoped 22" Bbl'ed bolt field rifles. (M700/M70/MP)
The 6.5x55mm is an aperture sighted 24" Bbl'ed bolt field rifle. (RH-AF)
Enamored w/ both high SD heavy-for-caliber bullets and mild recoil, and bein' genetically graced w/ "stingy Scottish fingers"...
... have settled on the inexpensive cup-n-core Speer Grand Slam (~ $0.22/pop, w/ rebate) for both calibers as a basic field load.
.270 WCF: 150 gr. GS @ ~ 2800 fps (~ 18.5 ft-lbs of recoil for an 8.5 lb scoped rifle)
- SD: 0.279
- BC: 0.378
~ 55.0 gr. IMR 4831/ 57.5 gr. H4831
- CCI 200 primers
6.5x55mm: 140 gr. GS @ ~ 2740 fps (~ 16.0 ft-lbs of recoil for a 7.5 lb aperture sighted rifle)
- SD: 0.287
- BC: 0.498
~ 45.0 gr. IMR 4831/ 47.0 gr. H4831
- CCI 200 primers
The LOS offset is ~ 1.5" for the scoped .270's, and 15/16" for the aperture sighted 6.5x55mm.
When all are sighted in for 200 yards...?
... they have the same ballistic trajectory to 300 yds., and < 2" difference at 500 yds.
From 100-500:
+2/0/-8/-24/-48.
Wind drift: is ~ 50% greater w/ the .270/150 gr.
GR
The 6.5x55mm is an aperture sighted 24" Bbl'ed bolt field rifle. (RH-AF)
Enamored w/ both high SD heavy-for-caliber bullets and mild recoil, and bein' genetically graced w/ "stingy Scottish fingers"...
... have settled on the inexpensive cup-n-core Speer Grand Slam (~ $0.22/pop, w/ rebate) for both calibers as a basic field load.
.270 WCF: 150 gr. GS @ ~ 2800 fps (~ 18.5 ft-lbs of recoil for an 8.5 lb scoped rifle)
- SD: 0.279
- BC: 0.378
~ 55.0 gr. IMR 4831/ 57.5 gr. H4831
- CCI 200 primers
6.5x55mm: 140 gr. GS @ ~ 2740 fps (~ 16.0 ft-lbs of recoil for a 7.5 lb aperture sighted rifle)
- SD: 0.287
- BC: 0.498
~ 45.0 gr. IMR 4831/ 47.0 gr. H4831
- CCI 200 primers
The LOS offset is ~ 1.5" for the scoped .270's, and 15/16" for the aperture sighted 6.5x55mm.
When all are sighted in for 200 yards...?
... they have the same ballistic trajectory to 300 yds., and < 2" difference at 500 yds.
From 100-500:
+2/0/-8/-24/-48.
Wind drift: is ~ 50% greater w/ the .270/150 gr.
GR
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