Started experimenting with these Sierra 100 GR TGK's this afternoon. shooting the 22" CZ527 again. Only loaded 7 rounds in .5 gr increments up to 30.5 grains of Power Pro 2000 MR. Looking to test for pressure & velocity. Velocity started at 2415 & peaked out at a mere 2666 & I am not expecting much more in terms of greater velocity / pressure potential.
With what little Power Pro 2000 I have shot so far, Im of the opinion this is a slow lot.
Good news is all 7 rounds from the 27.5 gr load to the 30.5 gr load printed near MOA with 5 rounds falling sub .5 MOA. with a 15 mile an hour tail wind and the bayonet on the barrel. Where does a guy go from here?
Last 2 rounds at 30.0 gr & 30.5 gr yielded 2666 & 2650 respectively. These Fed 205 primers look like we have room for more pressure yet, How much more pressure. Tempted try some Win Small rifle primers with the thinner cup to get a better feel for pressure. I have been seeing slightly pierced primers with those WSR's as max load is being approached.
With what little Power Pro 2000 I have shot so far, Im of the opinion this is a slow lot.
Good news is all 7 rounds from the 27.5 gr load to the 30.5 gr load printed near MOA with 5 rounds falling sub .5 MOA. with a 15 mile an hour tail wind and the bayonet on the barrel. Where does a guy go from here?
Last 2 rounds at 30.0 gr & 30.5 gr yielded 2666 & 2650 respectively. These Fed 205 primers look like we have room for more pressure yet, How much more pressure. Tempted try some Win Small rifle primers with the thinner cup to get a better feel for pressure. I have been seeing slightly pierced primers with those WSR's as max load is being approached.