I have had good results with R22 and VV 165. But R26 is looking promising and will produce slightly higher velocities.

Use 60-62 gr. R26 for about 3200 fps in a 25 inch barrel.
The TTSX produces less pressure than some other bullets because of the ridges but I haven't really leaned on it yet to see if I can add more powder. Go slowly as R26 won't show any sign of pressure until you are up to a proof load, especially in an AI cartridge.

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