Re: IMR-4350 temp sensitive???
With the 100gr bullets in my 25-06, I tried several powders when developing the final load. I personally found that IMR-4831 gave the most consistant, and best groups from my rifle. It varied hardly any from top summer temps to colder winter temps. However, when I switched to the Sierra bullets, the same was not the case. I went through about a full box trying to hit something that would shoot using the same loads I had with the BT. I finially gave up and called Sierra and they told me to try IMR-4350 and it gave me one hole groups instantly at 3350.
As for the load TIm was referring to, and my 30-06 experience, this was actually using a compressed load of RL-22. The particular load would group under 1" out at 200yds and was grouping just under 3" at 450. I had worked it up using the 165gr BT for a particular deer we were hunting which came out at the furtherest corner of our property. I deveolped the load, and shot it to that spot several times through the summer and fall. Then when deer season was on it's finial day, I had a chance at another buck and chose the 30-06 to try out the load. What resulted was basically a squib load, due to the cold temps and compressed charge. The round sounded and felt like a reduced load of wet paper.
I would toss the cases, and go back to new cases and you should be fine. On future cases when you clear the flash hole you just want to clean enough that the cutter gets a smooth feel to it after you clear the burr. ANymore than that you wasting cases.
Mike / Tx
"Heck why would I lie, most folks don't believe the truth when I tell them"