My first twenty rounds neck sized only, third time firing them total. Had some minor bolt tightness that I felt was because of the Neck Sizing (worked with a Specific RCBS Neck Sizing Die) but as I ejected this one (photos below) and two others I am concerned with the markings from bolt face.
They ejected a "smidge tight" tho I have had factory rounds eject as tight.
Noticing some of the comments on other WSM loads from factory being hotter than others I am wondering if you guys can analyze these pics of the worst marked round and tell me what you think,
Is this primer looking cratered? I am judging by comparing to Factory Fed stuff I have fired and it looks ok in comparison, but I can't really tell with my eyesight a bit fuzzy ??
Here's the stats:
Hornady 140gr SST's
CCI 250's (hand set with RCBS tool)
RL-19 at 56.5 grains
Also loaded some 59.1 gr which did not eject tight or leave marks
(Hornady book has options of 53.9, 56.5, 59.1 and 61.7 as redzone load)
The book COL is 2.785" but I went to mag length 2.875 for some and over to 2.90" for a few, Total of twenty rounds only three were tighter ejecting and left bolt marks similar or lighter than this pictured
Finding OAL to the Lands with Hornady tool I measure these as .09" off the lands (the 2.90 COAL rds and 1.3" off the lands for the 2.875 COAL)
Used a Hornady Comparator to get these "off the lands" #'s
One of the marked rds was using IMR 4350 at 56grs which is also midrange in Hornady book (options 53.4, 56.0, and 58.6 as Redzone) this is the one at 2.875 COAL
I also measured the cases afterward oal length, neck width, shoulder width, and head width and found them all exactly the same compared to other fired rounds
I did not trim them as they were at or below the book "case trim length" of 2.090, and still are after firing
These may be too much info but measurements were, Fired case length 2.087, neck width .315", shoulder width .543", and head width .557" (that's measure just up from the case head at about the area that they seperate in book pics
Thanks for input and any info/experience with .270WSM or other WSM oddities