I just got my new 6br hunting rifle back this past week and today i got a chance to shoot it. Dont really know that it matters, but my rifle is a stiller predator shilen varmint 10twist 26". Ok, I had this barrel chambered for a 6 br .262 neck when i first had it made earlier last month. I had it on a rem 700 action but i didnt like the way it ejected the little BR cases so i sold the rem 700 and bought a stiller. While i had my smith re-installing the shilen barrel off the rem, and on to the new stiller action, i had him do away with the tight neck. This is my hunting rifle, and i didnt want to mess with the tight necks any longer. The hole reason i am mentioning this is that when the barrel was a tight neck 6br it shot 87gr v-max and varget powder very well. The barrel only had around 50 shots when it was swapped over.
Ok today i loaded up some 75gr v-max some 87gr v-max and some 65gr v-max with 30-33gr of varget powder accordingly. I proceeded to shoot some 5 shot groups, while shooting over the chronograph. The numbers the chrony was giving were really unimpressive. What i mean by that, is that there was sometimes 70-80fps and as much as 100fps difference from shot to shot. I personally havent ever seen this much spread in velocity before. I weigh all my charges very carefully. I must add my chrono is a cheaper model, but has proven reliable in the past. The sun was also pretty bright today, so maybe that has something to do with it. The groups were also nothing to write home about. .600 was probably a good average for the day. I did have one small 3 shot group that went .223 with the 65gr v-max. I am no expert but i have to assume that this barrel no longer likes varget powder. I do think i will try the 65gr v-max again with another powder, and maybe the 87gr v-max as they were .500 respectfully. The only other thing i can think to add is that the chamber in my barrel was cut for 105gr bullets. I was aware of this when i had my smith cut it. I dont think it matters since the br has such a long neck anyway. The bullets base sits level with the top of the shoulder neck junction with 87gr v-max touching the lands. the 65gr bullets sit a bit higher as expected.
I am not really asking anything here except maybe if anyone has experienced such a velo spread before and maybe what powder i should try next. I just thought this was pretty interesting to see the numbers so scattered. I havent ever experienced this before, and i am not real sure how to make heads and tails of it. One more thing just came to mind. The primers i used are some older federal 205 magnum. I have been told these primers do not exist, but they do. I have about 500 of them, and thought i would use them up for hunting purposes. I hope i havent bored you fellas with all this. I am sure some of you all have seen this before. I love learning, and this is just another learning experience. Now what to do next is i guess the question. Thanks for reading! Lee
Ok today i loaded up some 75gr v-max some 87gr v-max and some 65gr v-max with 30-33gr of varget powder accordingly. I proceeded to shoot some 5 shot groups, while shooting over the chronograph. The numbers the chrony was giving were really unimpressive. What i mean by that, is that there was sometimes 70-80fps and as much as 100fps difference from shot to shot. I personally havent ever seen this much spread in velocity before. I weigh all my charges very carefully. I must add my chrono is a cheaper model, but has proven reliable in the past. The sun was also pretty bright today, so maybe that has something to do with it. The groups were also nothing to write home about. .600 was probably a good average for the day. I did have one small 3 shot group that went .223 with the 65gr v-max. I am no expert but i have to assume that this barrel no longer likes varget powder. I do think i will try the 65gr v-max again with another powder, and maybe the 87gr v-max as they were .500 respectfully. The only other thing i can think to add is that the chamber in my barrel was cut for 105gr bullets. I was aware of this when i had my smith cut it. I dont think it matters since the br has such a long neck anyway. The bullets base sits level with the top of the shoulder neck junction with 87gr v-max touching the lands. the 65gr bullets sit a bit higher as expected.
I am not really asking anything here except maybe if anyone has experienced such a velo spread before and maybe what powder i should try next. I just thought this was pretty interesting to see the numbers so scattered. I havent ever experienced this before, and i am not real sure how to make heads and tails of it. One more thing just came to mind. The primers i used are some older federal 205 magnum. I have been told these primers do not exist, but they do. I have about 500 of them, and thought i would use them up for hunting purposes. I hope i havent bored you fellas with all this. I am sure some of you all have seen this before. I love learning, and this is just another learning experience. Now what to do next is i guess the question. Thanks for reading! Lee