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82.5 grains of H1000 with a 168 grain bullet /ubbthreads/images/graemlins/shocked.gif
That's a hot load. It HAS to be past max...pressure sign or not.
Was that new brass?
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It is with new Winchester brass. I also shot some with some fired Win brass. It is about 1 grain over max according to Barnes. I measured the cases before and after firing....no change. Primer pockets are still tight. I contacted a Hodgon tech last week and asked him about the load data they had.....I saw where some guys were running 83.5 grains with a 160 grain bullet, he said their data was pretty conservative. They show 80.7 grains H1000 = 51,500psi with a 160gr. The STW max is 65,000 psi. I imagine their are lots of variables between rifles. My rifle has .220" freebore. If the bullets could get to the lands, the 80.7 or less might be the max. I am very cautious when reloading. I have seen bolts come flying out and actions blowup(mainly on a homemade 50 cal by a local smith). In the reading I have done on this forum and others, if there is no case head expansion, the bolt lifts easily, and the primer pockets are tight, you should be ok. I am using Fed 215M primers, which flatten out easily. My minimum loads sometimes flatten them out. I put in some WLRM primers and they looked perfect. They are a little harder from what I have been told.
The Load that 300Win listed above with IMR7828....IMR lists 76.0 grain max with 62,300 psi. I am not sure what a grain increase equates into psi gain. I think it is always best to start below the manufacturers max and work your way up. Every gun will be different. We have a Kimber 300wsm that reaches max before our Shilen barreled 300WSM. It also gets 100fps faster with a 2" shorter barrel and less powder. It comes down to the barrel and chamber.