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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
New GSC 338 LRH bullets.
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<blockquote data-quote="tim_w" data-source="post: 1047135" data-attributes="member: 11132"><p>Not to get on any side of the "debate"? that has sprung up in this thread I want to make something clear. From my shorter vel tests of the various bullets the BC were higher than what I got shooting across two chrono. I did not think much of this as it was a few years ago and basically most everyone BC that were computer derived all seemed to come out high compared to drops. ( I recall some botique bullets that were popular on here having extremly high BC published) Thus, your findings do not surprise me. I did not know they got that extreme and again I am no expert and you most definitely are, I recall them being in the 15-20% overage range. </p><p></p><p>As I think you have eluded to, the drive bands have to be taken into account and that maybe one of the issues. Other than eliminating them the other thought I had was possibly to have gain twist barrel that ended in rapidly increasing twist rate to "smooth out" the drive bands as it goes down the bore. I had noticed in a few bullets we were able to recover how the bands had been smoothed out somewhat which was one thing that, among others, lead to that idea<em> (as ridiculous or not as it maybe.)</em> The higher vel allowed by the soft copper and lower bearing surface area I would "think" would also help to this end. Again this would obviously be in the frame work of a very specialized setup i.e one bullet or at least one design of bullet setup.</p><p></p><p>I always try to give accurate information. Sometimes I screw the pooch and mess up but its never my intent. The facts are the bullets I received from GSC were very consistent and well made. I do concur the BC were elevated. I can only speak to the specific ones I used and were no where near those with no limit on OAL. As my interests were only in that very specific area I have no idea if the BC depart even more or not. I also do not have the data in front of me and do not like to make rock claims without solid backup of those claims. Thus I can only say what I recall from memory and noted as such. </p><p></p><p>I greatly respect the work and quality of it that you do, not to mention, the large amounts of data you freely publish on the net for the edification and benefit for all who care to take the time to learn from it. I have learned a great amount from your posts and that which is contained in your books. I very much enjoyed the recent post on popular chronograph performance testing. I had asked a question in there but I think it got lost in the rest of my ramblings in my post. It was dealing with changes in vel in the short distance after exiting the muzzle.</p></blockquote><p></p>
[QUOTE="tim_w, post: 1047135, member: 11132"] Not to get on any side of the "debate"? that has sprung up in this thread I want to make something clear. From my shorter vel tests of the various bullets the BC were higher than what I got shooting across two chrono. I did not think much of this as it was a few years ago and basically most everyone BC that were computer derived all seemed to come out high compared to drops. ( I recall some botique bullets that were popular on here having extremly high BC published) Thus, your findings do not surprise me. I did not know they got that extreme and again I am no expert and you most definitely are, I recall them being in the 15-20% overage range. As I think you have eluded to, the drive bands have to be taken into account and that maybe one of the issues. Other than eliminating them the other thought I had was possibly to have gain twist barrel that ended in rapidly increasing twist rate to "smooth out" the drive bands as it goes down the bore. I had noticed in a few bullets we were able to recover how the bands had been smoothed out somewhat which was one thing that, among others, lead to that idea[I] (as ridiculous or not as it maybe.)[/I] The higher vel allowed by the soft copper and lower bearing surface area I would "think" would also help to this end. Again this would obviously be in the frame work of a very specialized setup i.e one bullet or at least one design of bullet setup. I always try to give accurate information. Sometimes I screw the pooch and mess up but its never my intent. The facts are the bullets I received from GSC were very consistent and well made. I do concur the BC were elevated. I can only speak to the specific ones I used and were no where near those with no limit on OAL. As my interests were only in that very specific area I have no idea if the BC depart even more or not. I also do not have the data in front of me and do not like to make rock claims without solid backup of those claims. Thus I can only say what I recall from memory and noted as such. I greatly respect the work and quality of it that you do, not to mention, the large amounts of data you freely publish on the net for the edification and benefit for all who care to take the time to learn from it. I have learned a great amount from your posts and that which is contained in your books. I very much enjoyed the recent post on popular chronograph performance testing. I had asked a question in there but I think it got lost in the rest of my ramblings in my post. It was dealing with changes in vel in the short distance after exiting the muzzle. [/QUOTE]
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New GSC 338 LRH bullets.
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