I am loading some 180 gr.triple shock bullets into my friends .300 win mag. I am using a barnes manual and Hodgdon h-1000 powder(for this load). They say to load the triple shocks the same as an x bullet, so that's what I did. Here is my problem. I was using a variety of charge weights to work up a load as we are going to the range tommorrow. When I got to the max load of 81gr.(even at 80gr.) it seemed to almost fill up the case to just below where the neck meets the shoulder. It was definately above where the shoulder meets the body. I checked the scale and it was correct. Looking at where the powder was and seeing how far the longer barnes bullet had to travel into the case it seems like an extremely compressed load. My problem with this is that I am using cci 250 magnum primers and the barnes manual used federal 210m primers. Do you think this will cause me a pressure problem? I am going to start shooting with the lower charges, but even though I checked and rechecked it just seemed like there was too much powder in the cases. Am I missing something?
don't be afraid of heavily compressed powder charges. As long as you've worked up to them they're safe.....If they wasn't safe you'd have had signs long before you got to these loads.
Posts: 28849 | Location: western Nebraska | Registered: 27 May 2003
It sounds like you haven't shot these rounds yet. Look for signs of preasure as you go. I have always used Fed215 in my 300 Win and never tried the Fed210.
No I haven't shot them yet. I've loaded quite a few rounds in my time but never this case/powder combo. It just seemed like a lot of powder. I have a .300 RUM and a max charge of h-1000 barely(if at all) hits the shoulder. Just seemed odd to me.
Quote: don't be afraid of heavily compressed powder charges. As long as you've worked up to them they're safe.....If they wasn't safe you'd have had signs long before you got to these loads.
RIGHT! Shoot the lower powder charges first, of course, in increasing charge weights, and stop shooting when you get to the one load that is the most accurate, or when you do encounter signs of excessive pressure, whichever happens first.
My 175-grain load in the 7X57mm Mauser uses 54 grains of RE 22 or MRP1, and it is almost at the mouth of the case after the charge has been loaded before I seat the bullet. This charge is loaded in two increments - half, then tap case gently with screwdriver handle to settle powder, then add the rest and tap again. You cannot just dump this charge in the case, it overflows unless settled.....
While it may be true that lack of excessive pressure indications means nothing, it IS true that the PRESENCE OF EXCESSIVE PRESSURE SIGNS DOES MEAN SOMETHING! It means you need to back off about 5%!!
There must be some other load that does not have to be compressed as much. A downside with heavily compressed loads is that the bullet can work out after seating. This usually happens right away but why chance it?
