Re: Has anyone else tried these in their 303 rifles?
Dave:
I have used them in 5 Lee speeds & 7 assorted Parker-Hale, Churchill, Cogswell & Harrison & Globe sporters built on the #1 Mk. III, #1 Mk. III* & C.L.L.E. platforms, all with my go-to 42.0 grs. of RL15.
Slightly more than half, especially the older "loose-grooved" rifles preferred them over (ie. were more accurate than) Hornady or Speer 174-180 RNSP bullets, or at the very least, proved capable of accuracy equal to them. I posit it is because Cam-Pro's jackets are softer, so more easily expand to obturate in those barrels' grooves. I used to see the same thing with the old Remington 180 gr. SPCLRN bullets, even though they usually measured 0.310"-0.311" at most.
I've found, however, that Sierra's 180 SPT, is the one to beat insofar as accuracy is concerned, perhaps because their bullet jackets' are more concentric than the others. Mind you most Sierras I'ved used over the years were at least equal to, if not more accurate than other C & C hunting bullets.
I've also found that with a tight-grooved, or at least minimally-worn barrel, the Hornady's, Woodleighs & the old 215 gr. Normas are fantastic. Even the old SAKO & Norma RNSPBT bullets perform nicely in them.