Re: Info on breaking in a new Remington SPS700 in .223
You can check the twist rate using your cleaning rod, and bore brush. You put the rod w/ bore brush about 2 inches into the barrel. Make a witness mark on the rod at the handle so that you can track it as it spins. Also make a mark as close to the action or barrel depending on which end you put the rod. Push the rod in and let your witness mark at the handle make a full rotation as you push the rod slowly down the barrel. When it makes on full rotation, make a second mark at the action or barrel and remove the rod. Take a tape measure and measure between the 2 marks. This will be a close determination of the barrel twist rate.
The slower the twist rate (1:14, 1:12), the lighter bullet you have to shoot. The faster the twist rate (1:7, 1:8, 1:9), the heavier the bullet you can use. For 1K shooting, a 1:8 or 1:7 twist is what you want. You won't get that in a factory tube. I think a 1:9 is the fastest you can get that I'm aware of. Savage offers a 1:7 in 223 in their LRPV varmint model 12.
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