MatthewUSMC8791
01-11-2010, 12:10 PM
Another question for all you shooters... I sure like this place.... As you know i have been shooting my Savage 300 win mag using Winchester brass and IMR 4350 (69.0gr) and Federal 215M primers with some good results....
Purpose of this thread is does anyone have any issues with measuring up the COAL with Winchester brass???? i use a Mitutoyo Caliper #500-196-20 and the Hornady comparator and measuring from the base of the case you never get the same reading...
I notice that from the very begining... to tell ya my procedure for reloading is not nearly as intense as some since this really is a factory huting rifle except for the replacement stock i have on.
I square up the primer pockets, debur in/out flash hole, full length size the brass with a forester die(only new brass) if its fired brass i only neck size using redding dies and then i trim to length, deburr the necks in/out, i use a redding competition seating die and i try to mic up each case to exactness. see nothing too crazy in my process.
The biggest probelm i found is that the brass base is never flat. I know they are punch out on a machine, but damn, they are out .002-.004.. so i tyically just have a range of what my actual COAL is... my rifle using the nosler 168BT, touch at 2.931 using the Hornady guage, and shooting them they like its at 2.920-2.925 with the hornady comparator. so when i mic it up,its some where in that bull park... i just thought you buy Winchester brass and your good to go.... guess not.
what can you do to the bras to fix it the basses for a much for exact measurement.
Purpose of this thread is does anyone have any issues with measuring up the COAL with Winchester brass???? i use a Mitutoyo Caliper #500-196-20 and the Hornady comparator and measuring from the base of the case you never get the same reading...
I notice that from the very begining... to tell ya my procedure for reloading is not nearly as intense as some since this really is a factory huting rifle except for the replacement stock i have on.
I square up the primer pockets, debur in/out flash hole, full length size the brass with a forester die(only new brass) if its fired brass i only neck size using redding dies and then i trim to length, deburr the necks in/out, i use a redding competition seating die and i try to mic up each case to exactness. see nothing too crazy in my process.
The biggest probelm i found is that the brass base is never flat. I know they are punch out on a machine, but damn, they are out .002-.004.. so i tyically just have a range of what my actual COAL is... my rifle using the nosler 168BT, touch at 2.931 using the Hornady guage, and shooting them they like its at 2.920-2.925 with the hornady comparator. so when i mic it up,its some where in that bull park... i just thought you buy Winchester brass and your good to go.... guess not.
what can you do to the bras to fix it the basses for a much for exact measurement.