Shuz
05-12-2017, 09:53 AM
I recently discovered that size does matter! The rifle is a Remington 700CDL in .35 Whelen with a stock factory 1:16 twist bbl.
The load is 25g of 2400 behind a 206g Lee 35-200FN that has been quench cast to achieve a hardness of Bhn 22.Primer is CCI 200 and boolits were loaded to an OAL of 3.075".
The following are the results of 4 separate 5 shot strings measured over an Oehler 33 chronograph:
Bullet sized diameter: .359" ES 81 Ave 1923fps SD 32
.359" ES 29 Ave 1968fps SD 12
Bullet sized diameter: .360" ES 86 Ave 2136fps SD 36
.360" ES 13 Ave 2190fps SD 5
Whoda thunk that a mere .001 difference in sizing would result in such a difference in velocities!
The sad thing is that none of the 5 shot groups at 100 yards was good enuf for CBA competition with the best measuring 2.497" .
I always seem to get one "flyer" out of each 5 shot group. Oh yes, all boolits were weighed, and as each was shot, there was no discernible difference in shot placement due to weight differences; which only amounted to +-1g from 206g.
Comments!
The load is 25g of 2400 behind a 206g Lee 35-200FN that has been quench cast to achieve a hardness of Bhn 22.Primer is CCI 200 and boolits were loaded to an OAL of 3.075".
The following are the results of 4 separate 5 shot strings measured over an Oehler 33 chronograph:
Bullet sized diameter: .359" ES 81 Ave 1923fps SD 32
.359" ES 29 Ave 1968fps SD 12
Bullet sized diameter: .360" ES 86 Ave 2136fps SD 36
.360" ES 13 Ave 2190fps SD 5
Whoda thunk that a mere .001 difference in sizing would result in such a difference in velocities!
The sad thing is that none of the 5 shot groups at 100 yards was good enuf for CBA competition with the best measuring 2.497" .
I always seem to get one "flyer" out of each 5 shot group. Oh yes, all boolits were weighed, and as each was shot, there was no discernible difference in shot placement due to weight differences; which only amounted to +-1g from 206g.
Comments!