I got a rks gt on my 257wby. Installed by him. Initial test loads clustered at an inch or so and 3700 fps. Adding grains I broke 3800-3900fps but we're getting pressures. The only group i shot was still under a inch.
The best load is 3725fps with 7828sCc.this is the first handcrafted bbl I've had so I don't know what other custom guys build but I would highly recommend his shop to build it for the 600$.
Keep it in alberta.
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