LRHWAL
Well-Known Member
Sort of a bunch of questions all at once. Thanks for any input.
I've read quite a bit (here and elsewhere) about a few of these topics, but I have a few questions.
After splitting a neck on my .300 WM on firing it on the weekend a lot of questions arose... the split is longitudinal (i.e. not around the circumference), right through and is in the middle of the neck (i.e. not right through to the mouth or into the shoulder area).
The loads have been fairly middle of the range and this is the 8th loading of the case with no annealling and no apparent other problems. The 7th loading still produced good accuracy and SD's around 7-10 fps. Saturday was not chronoed, but (accuracy) results seemed really bad. I'm now guessing something on the neck tension was the reason. I'm inclined to toss the whole batch of brass, although I suppose it could be "one bad case". I only picked it up last night when I was getting set up to clean the cases.
Does neck tension go suddenly or is it a progressive thing? As the 7th load had velocities within about 5-10 fps from the 3rd is it fair to assume that neck tension was pretty constant until that point? In other words, as the cases age will neck tension change show up at the chronograph or how else can I check it is still consistent?
What type of case life should I expect with a factory chamber, minimal shoulder bumping and midrange type loads?
I'm sure I have more questions that will come to me as / if a discussion starts.
WL
I've read quite a bit (here and elsewhere) about a few of these topics, but I have a few questions.
After splitting a neck on my .300 WM on firing it on the weekend a lot of questions arose... the split is longitudinal (i.e. not around the circumference), right through and is in the middle of the neck (i.e. not right through to the mouth or into the shoulder area).
The loads have been fairly middle of the range and this is the 8th loading of the case with no annealling and no apparent other problems. The 7th loading still produced good accuracy and SD's around 7-10 fps. Saturday was not chronoed, but (accuracy) results seemed really bad. I'm now guessing something on the neck tension was the reason. I'm inclined to toss the whole batch of brass, although I suppose it could be "one bad case". I only picked it up last night when I was getting set up to clean the cases.
Does neck tension go suddenly or is it a progressive thing? As the 7th load had velocities within about 5-10 fps from the 3rd is it fair to assume that neck tension was pretty constant until that point? In other words, as the cases age will neck tension change show up at the chronograph or how else can I check it is still consistent?
What type of case life should I expect with a factory chamber, minimal shoulder bumping and midrange type loads?
I'm sure I have more questions that will come to me as / if a discussion starts.
WL