Mickey

You are right. All my handloading guides all only list up to 174/180 grains.

However the Australian Defence Industries site lists some loads for .303 - 215 gr bullet

http://www.adi-limited.com/handloaders-guide/rifle.asp

Use it at your own risk.

Bullet weight/ Powder/ Barrel length / Maximum powder weight/ Velocity fps

215 AR2206 24" - - - 39.00 2250 -
215 AR2208 24" - - - 39.50 2265 -
215 AR2209 24" - - - 45.00C 2185 -

(45.0 C = compressed load)

Obviously reduce by at least 5% fo starting loads and watch for pressure signs (I am sure you know this!)

Check out this page for powder equivalents of AR powders to those you might have access to.

http://www.adi-limited.com/handloaders-guide/equivalents.asp

eg AR2208 is similar to IMR4064
AR2209 is similar to IMR4350
AR2206 is similar to RL12