A friend asked me to load some 139 interbonds in his 280, he got a box of 100. The box is almost gone and we still havent found a load yet. Weve tried just about every powder on my shelf. I have asked him numerous times to try the 140 B/T's I shoot in my 7 rem mag but hes dead set on finding something for these interbonds. I personally would have switched by now but hey its his choice! ........funny part is, he got a box of Core Lokts with the gun and they shot like 1.1-1.2" maybe he should have just stuck with them to hunt with.