Been working up a load for my .243. So wrnt to try it and once case was ejected the case was covered in black remanants half way up the case. Could anyone tell me why this could be? There was no signs of over pressure, just this black remanaints on the case
Sorry no pictures. But i cant see how it would be low pressure bacause im quite hot with these loads (1/2 grn of max) so if anything inthought it was over pressure but no other signs of that on case. I tryed a load a grn less the previous time and there was no remanats on case with it. But with these that are a grn higher there is.
Newhornady brass once fired. Is this the case of the neck not creating a seal or why wud the brass be at fault?
Been working up a load for my .243. So wrnt to try it and once case was ejected the case was covered in black remanants half way up the case. Could anyone tell me why this could be? There was no signs of over pressure, just this black remanaints on the case
I had 2 loads, 1 42gran N160 and the other load 43grnsN160. The 42 grain was okay, just a little blackening around the neck wich didnt bother me. Gave me .5 " group. The 43 grain tried 2 rounds and thy both come out sooty, the soot come down possible 2 thirds of the case. These cases are neck sized as this is first load from them. Does this help?
If you're using Hornady cases, these are much lighter and thinner than other makes. More room inside, so more likely to be lower pressure.
If you're using Hornady Handbook loads (recent version) then the recommendations in this are lower than other manuals such as Speer. I go with Speer and a chronograph.
Raise the charge in half or 1-grain increments .......... I've used 45 grains N160, and it's fine for me.
I would start by dumping the brass. The case is the seal against all that nasty pressure. If it's not working, I'd find new stuff.~Muir
Wish it was that easy. But the price of brass i cant afford to be trowing money away. As i say these cases are new. Why would you throw away new once fired cases?