Quick question for the reloading crowd. I took a couple of ladders to a BDS range day today.
I've been trying H335 under a 110gr SP in .308 and Reloder 15 under a 150gr SP.
I couldn't get close to maximum loads at all. I was expecting that there might be a point before maximum where pressure signs started appearing, but I was barely above the starting loads when I started seeing pressure signs (brass flowing into the extractor recess the most obvious, some stiffness in the bolt also). In spite of the pressure signs, the way they were shooting made them feel like they were light, mild loads - certainly not "maximum pressure" loads.
Both lots were loaded within the limits of the data, above the minimum OAL (I don't have a comparator / measure-to-ogive gauge yet). The 110s at 2.580" and the 150's at 2.725". For both, I could seat the bullet further out of the case, though probably not to max OAL for the cartridge in the case of the 110s.
What I'd like to know is whether a difference of a tenth of an inch or two seating depth is likely to make much of a difference to pressure? I.e. if I've got another 3-5gr before I get to maximum load, should I seat further out of the case and try another ladder to see if I can get further towards maximum or is it not likely to make much difference as to how far I can go?
I should mention that one load of the 150's looked very promising (one ragged hole at 100m) but that the rest of them were mediocre with respect to accuracy. None of the 110's performed particularly well, so I either need a new approach or to try a new powder.
Thanks for any thoughts / pointers you can give.