.257 Roberts hunters only

115gr partitions if you’re looking for the heavy end, but in the Bob you might try the 100gr Speer SPBT or Hot-Cor. You can easily stay in the short package and keep speed up.
 
My Remington model 722 "Bob" is now rechambered to .257 Roberts Ackley Improved with a 40 degree shoulder. Since it was rechambered it has the original 1:10 twist. I've been shooting Speer 120 gr, but have decided to give the 115 gr NPT a try. Since the 722 is a short action I need to watch bullet choices and seating depth to avoid feed problems. Seating to the lands with any bullet makes it a single shot.
 
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I’ve had a 257 Roberts in the fold for over 40 years. First a Remington and later a Ruger. Both long action rifles. While I have used other cartridges over the years the Roberts is my favorite deer rifle. I’ve never had a deer go more than 20-30 yds after the shot and most were drt. My two favorite bullets are the Hornady 117 btsp, and the now unavailable in component form 120 gr core-loct. While I have tried several powders I have settled on loads of ww760 to get both bullets to 2800 fps +or-.
 
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