Has anyone done any experimenting with IMR 7828 SSC in there 6.5x284? If so could you please post. Its hard to come by retumbo these days and I always see alot of 7828ssc. Also I'm using the 140 berger as well.
Your velocity reading using 51.5gr of H4831sc is the same as I get using that charge in my Savage.On this rifle it shows pressure early. I had pressure at 51.5 grains of the 4831ssc. I was only in the 2760ish for velocity. It has always shown pressure early but the velocity seems to be slow for a 6.5x284. I actually considered replacing the barrel but the gun does shoot well just not fast. I actually got stiff bolt lift and an injector marks on the factory HSM 140 bergers loads. They did run at or around very close to 3000fps in the gun when I had them out shooting. The gun grouped them well also but I don't like the over pressure thing so much.
Did you get any other advancements with 7828?I was able to get out today and tried the 7828ssc. At 52 grains I am about the same speed as the hybrid 100V. At 53 grains I got good results. I was firing 4 shot groups and I really did not let the barrel cool enough but I had a spread from 2942 to 2949 for 4 shots. Here is were some thing got really weird. At 52.5 grains I had a case that gave me tight bolt lift and injectors marks. The 53grns was all ok for bolt lift but had injector marks. 53.5 only about 20fps faster with 2 having stiff boat lift. I had 2 left at 54grns which produced 2990ish fps but one was ok and the other had a really stiff bolt lift. I starting reading over a couple of other threads this morning and started to wonder about a few things. If possible I wonder if my case neck are 2 thick from not trimming neck thickness and causing extra pressure and if not annelling the neck is also causing non consistent neck tension? That might explain the large spread at 52.5grns. I got like 40fps spread for the same charge.
Here are my loads with my 284 NormaHas anyone done any experimenting with IMR 7828 SSC in there 6.5x284? If so could you please post. Its hard to come by retumbo these days and I always see alot of 7828ssc. Also I'm using the 140 berger as well.