powdergun said:
I was wondering how fussy you guys are with sorting brass. Today I was wieghing and sorting brass. The brass has been separated into lots with the same weight measured to .1grams. Do precision loaders sort to .01g or more or am I on the money for consistancy.
Just curious and thanks for any info.
A few points:
Just sorting by weight isn't sufficient for truly accurate reloads. You can't mix manufacturers cases, even if they weigh the same, in fact you should try to stick to the same lot number. Small differences in the brass alloy and annealing of case necks and mouths can make significant changes in chamber pressures and hence, p.o.i. in new or once fired brass. Cases that have been reloaded multiple times, especially the case mouths, become work-hardened and need to be re-annealled by standing them in water up to the shoulder. Heat the case mouth until cherry red and then tip them over into the water. Now the work begins: Don't weigh the cases, which have at least been sorted by manufacturer until you:
1) make them all the same length
2) chamfer the mouth both inside and out
3) clean and "swage" the primer pocket
4) ensure the flash holes are exactly the same diameter.
There are tools for all the steps I've mentioned available from any gun store. Now you weigh the cases. .01gr. is fine.
A final few points for maximum accuracy:
!Protect the base of the bullet! it's the steering end, not the nose!
If you're firing in a bolt action rifle, neck-size only and single shot only, don't use the magazine.
If the bullet ogive allows, load the bullet so it is almost touching the rifling when chambered, note I said almost.
Crimp all the cartridges the same.
There is a lot more I could write about accuracy, email me at
sapper740@grandecom.net if you're interested in more info. Derek.