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How Do You Shortcut Load Dope?
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<blockquote data-quote="royinidaho" data-source="post: 133115" data-attributes="member: 2011"><p>Tim,</p><p></p><p>After writing the below stuff, I think you opened a can of worms!!!!!</p><p></p><p>I have been thinkin' about heading for TX for some pork. Some of the rifle zero considerations include:</p><p></p><p>Working up the load here in winter temps. The load will be the 169.5gr WC ahead of 98.2gr of US 869 for 3250 - 3276 FPS depending on temp (about 10* to 25* temp range) @ 4450 MSL.</p><p></p><p>Now I go down there and would expect to only have to reset the 300yd zero and shoot at 500 and 800 or so to verfy the new BC. Then go hunt.</p><p></p><p>But, I've been gathering from you and Mike that my load may be too "hot" for your neck of the woods. If that is the case I would expect to develop as "low/warm country" load a grain or 2 less than my high/cold/low humidity neck of the woods.</p><p></p><p>The pressure consideration, I don't think would be that much of a thing, for less intensive cartridges than the AMs.</p><p></p><p>For example I would also bring a 338 RUM or an open sighted #1 in 375 H&amp;H for for a stopper and wouldn't expect to have to change powder weight in either of these as each is a "less intensively designed" cartridge, if you catch my meaning. With the 338 WIN and 338 RUM I had several grains more powder to go before any bolt lift pressure occurred. With the AM, if I load it up to "just below" where I have bolt lift tension, it doesn't take much in additional powder or temperature to go beyond where pressures are comfortable..</p><p></p><p>If I went to the mountians of Colorade, Alaska, Montana (75 miles) I wouldn't change a thing. I'd just rezero and verify BC. If I went to LA/TX or the jungles of Central/South America I'd consider working up a lower pressure load.</p><p></p><p>The best bet is to do as buffalobob did which is drive and rig your RCBS Jr to your back bumper. /ubbthreads/images/graemlins/crazy.gif</p><p></p><p>Or ask him the difference between his Salmon Idaho loads and his VA/MD loads in that 7 AM.</p><p></p><p>As I'm typing I'm thinking: What if, if I came down there I used the RSI pressure trace thing and got some good base data then RSI'd the same load down there. That would be a heck of a drive for 5 or 6 shots but hey, any sacrifice for LRH. /ubbthreads/images/graemlins/grin.gif</p><p></p><p>The bottom line is that if you have enough interest some good data could be gleaned. I'm open to any ideas that you may have. Even the far fetched ones /ubbthreads/images/graemlins/wink.gif</p></blockquote><p></p>
[QUOTE="royinidaho, post: 133115, member: 2011"] Tim, After writing the below stuff, I think you opened a can of worms!!!!! I have been thinkin' about heading for TX for some pork. Some of the rifle zero considerations include: Working up the load here in winter temps. The load will be the 169.5gr WC ahead of 98.2gr of US 869 for 3250 - 3276 FPS depending on temp (about 10* to 25* temp range) @ 4450 MSL. Now I go down there and would expect to only have to reset the 300yd zero and shoot at 500 and 800 or so to verfy the new BC. Then go hunt. But, I've been gathering from you and Mike that my load may be too "hot" for your neck of the woods. If that is the case I would expect to develop as "low/warm country" load a grain or 2 less than my high/cold/low humidity neck of the woods. The pressure consideration, I don't think would be that much of a thing, for less intensive cartridges than the AMs. For example I would also bring a 338 RUM or an open sighted #1 in 375 H&H for for a stopper and wouldn't expect to have to change powder weight in either of these as each is a "less intensively designed" cartridge, if you catch my meaning. With the 338 WIN and 338 RUM I had several grains more powder to go before any bolt lift pressure occurred. With the AM, if I load it up to "just below" where I have bolt lift tension, it doesn't take much in additional powder or temperature to go beyond where pressures are comfortable.. If I went to the mountians of Colorade, Alaska, Montana (75 miles) I wouldn't change a thing. I'd just rezero and verify BC. If I went to LA/TX or the jungles of Central/South America I'd consider working up a lower pressure load. The best bet is to do as buffalobob did which is drive and rig your RCBS Jr to your back bumper. [img]/ubbthreads/images/graemlins/crazy.gif[/img] Or ask him the difference between his Salmon Idaho loads and his VA/MD loads in that 7 AM. As I'm typing I'm thinking: What if, if I came down there I used the RSI pressure trace thing and got some good base data then RSI'd the same load down there. That would be a heck of a drive for 5 or 6 shots but hey, any sacrifice for LRH. [img]/ubbthreads/images/graemlins/grin.gif[/img] The bottom line is that if you have enough interest some good data could be gleaned. I'm open to any ideas that you may have. Even the far fetched ones [img]/ubbthreads/images/graemlins/wink.gif[/img] [/QUOTE]
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