I know 4831 is supposed to be the go to powder for the 270, but I hear a lot of different data for the 243. USE MAXIMUM LOADS WITH CAUTIONÄ«e Alert: Publisher cannot be responsible for errors in published load data. I'm wanting to shoot 70-80ish grain bullets in the 243 and 130s in the 270. .270 Winchester (Barnes Reloading Manual 4) Warning Notes: case: R-P case trim length: 2.530' twist rate: 1:10' primer: Fed GM210M barrel length: 24' barrel: Krieger maximum loads should be used with caution NOTE: A 1:9.5' or faster twist is recommended for the 150-grain TSX. Warning! Notes: Case: Nosler primer: Fed 210 barrel length/make: 24" Shilen twist: 1-10" bullets: 140 GR Nosler AccuBond Spitzer, Ballistic Tip Spitzer or Partition Spitzer OACL: 3.320" maximum OACL: 3.340". I suspect real world velocities would be about 20-50fps below that, based on my experience with the powder in other cartridges. Data shows 3200fps with a 130gr, and 3000fps with a 150gr (from a 24' test barrel). Regardless, Ramshot X-Terminator is a great powder to use for the cartridge. It can be had as a light sporter or as a heavy barreled varmint/target style rifle. The NULA Model 20 Short uses an action perfectly sized for the. 270 Winchester (Using 140 GR Nosler Bullets) If you're looking for a potentially very fast ball powder for the 270Win, take a look at Accurate MagPro. For coyotes or feral hogs, the Barnes 80-grain TTSX and 47 grains of Hunter is deadly.
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