Originally Posted by yeahbuddyprostaff
building a .300 ultra. The magazine box in the action I am looking at is 3.65". I am thinking that this may be a little short.
What overall lengthe are you having the most sucess with when loading 210 or 180 VLD Berger?
I just dont want to limit my self with a short mag box.
Thanks in advance.
If you want to seat your bullets close to or up to the lands they will be too long for the mag box. The way I deal with that is to just put one round down and one in the chamber. The tip of the bullet of the round that is down is above the mag wall and will fit, but it only gives you a 2 shot configuration. For most LR hunting, that is more than enough. Your other option is to get a Wyats box.
I've only tried 210 Bergers in my Sendero 300 RUM. The base of the bearing surface is just above the junction of the neck and shoulder with a COAL of 6.860, about .010 off the lands. I'm not sure how long the 185's are but you might need to sit them back a little farther from the lands to get a good bite on the neck.
Some guys just seat them to fit in the mag box and they shoot fine. I like them close to the lands.