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<blockquote data-quote="ToKeepAndBear" data-source="post: 618451" data-attributes="member: 34194"><p>Redhunter - See corrected post further down on page 2 for accurate numbers. I mistakenly included the 200gr weight with the 165 BC and velocity in the calculation, a red headed step child of a ballistic calculation. Sorry for the confusion. Kind of like shooting at 800 yards and then shooting at 100 and forgetting to go back to zero!</p><p></p><p>Winmag - I know nothing about the ballistics of a 300wsm. I do know that my rifle shoots the 200gr SGK with a BC of 0.55 in the mid 2500s well (see attached photo). As far as the numbers, this was chronographed with an Oehler 35p, one of the more accurate chronographs produced, that gives a proof velocity via a 3rd screen. I am very confident in the numbers this chronograph records. You will see that the group I included was one of the more accurate in that node (shot prone from a bipod with a SWFA SS 3-9 scope at 8 power at 100 yards with a thick mil-quad reticle) and had a mean of 2535 measured a lasered 23 yards from the muzzle which works out to 2565 at the muzzle, ES of 27, SD of 10. (That is my only gripe with the Oehler, it comes with target stands that do not get low for prone shooting and require placement of the chrono in a depression 23-25 yards from the muzzle at my 100 yard spot. If you shoot from a bench the stands are perfect.) </p><p></p><p>Not too bad for hunting bullets that run $33 for a 100 with a good BC and ballistics. (However, my 260 TRG averages groups about half that size with a Hensoldt 4-16 scope and SMKs!) </p><p></p><p>No pressure signs until higher temps and 48.5 charge weight (Start low and work up in your gun!). The other accuracy node was at 46.5 gr and measured in 2470s with improved single digit ES numbers. I may end up running that load if it does better at long range as I think that velocity is probably adequate. The furthest I have fired the loads is 670 yards at the moment. They seem to ring the steel pretty good at that range and were very accurate! Will test again out to 870 yards this weekend.</p><p></p><p>[ATTACH]6788[/ATTACH]</p><p></p><p>Rifle in question:</p><p>[ATTACH]6789[/ATTACH]</p><p></p><p> A more standard length 24-27 inch barrel would likely have no problems shooting this load at 2600 with RL-17 or MR-2000 (people are shooting 208 Amaxs faster out of a 308 Win!). I did run into a slightly stick bolt lift at 48.5 at higher temps. The brass was fireformed Winchester brass that had been neck sized with a Lee Collet die. These sort of numbers are not unique to myself with RL-17 or MR-2000. I prefer MR-2000 as it is supposed to be more temp stable and meters REALLY well. (I have loaded up a couple hundred rounds with that powder and only had 1-2 overthrows with a chargemaster!)</p><p></p><p>See attached links for velocity numbers higher than mine with 208gr Amax's and other high weight 308 loads! These newer powders are achieving 100-150 fps velocity increases in many 308 loads. Don't take my word for it, buy some of your own powder and work it up in your 308. You may be pleasantly surprised with the results!</p><p></p><p><a href="https://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=1366044&page=1" target="_blank">https://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=1366044&page=1</a></p><p></p><p><a href="http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=1914964&page=4" target="_blank">Alliants new Power Pro 2000mr - Sniper's Hide Forums</a></p></blockquote><p></p>
[QUOTE="ToKeepAndBear, post: 618451, member: 34194"] Redhunter - See corrected post further down on page 2 for accurate numbers. I mistakenly included the 200gr weight with the 165 BC and velocity in the calculation, a red headed step child of a ballistic calculation. Sorry for the confusion. Kind of like shooting at 800 yards and then shooting at 100 and forgetting to go back to zero! Winmag - I know nothing about the ballistics of a 300wsm. I do know that my rifle shoots the 200gr SGK with a BC of 0.55 in the mid 2500s well (see attached photo). As far as the numbers, this was chronographed with an Oehler 35p, one of the more accurate chronographs produced, that gives a proof velocity via a 3rd screen. I am very confident in the numbers this chronograph records. You will see that the group I included was one of the more accurate in that node (shot prone from a bipod with a SWFA SS 3-9 scope at 8 power at 100 yards with a thick mil-quad reticle) and had a mean of 2535 measured a lasered 23 yards from the muzzle which works out to 2565 at the muzzle, ES of 27, SD of 10. (That is my only gripe with the Oehler, it comes with target stands that do not get low for prone shooting and require placement of the chrono in a depression 23-25 yards from the muzzle at my 100 yard spot. If you shoot from a bench the stands are perfect.) Not too bad for hunting bullets that run $33 for a 100 with a good BC and ballistics. (However, my 260 TRG averages groups about half that size with a Hensoldt 4-16 scope and SMKs!) No pressure signs until higher temps and 48.5 charge weight (Start low and work up in your gun!). The other accuracy node was at 46.5 gr and measured in 2470s with improved single digit ES numbers. I may end up running that load if it does better at long range as I think that velocity is probably adequate. The furthest I have fired the loads is 670 yards at the moment. They seem to ring the steel pretty good at that range and were very accurate! Will test again out to 870 yards this weekend. [ATTACH]6788.vB[/ATTACH] Rifle in question: [ATTACH]6789.vB[/ATTACH] A more standard length 24-27 inch barrel would likely have no problems shooting this load at 2600 with RL-17 or MR-2000 (people are shooting 208 Amaxs faster out of a 308 Win!). I did run into a slightly stick bolt lift at 48.5 at higher temps. The brass was fireformed Winchester brass that had been neck sized with a Lee Collet die. These sort of numbers are not unique to myself with RL-17 or MR-2000. I prefer MR-2000 as it is supposed to be more temp stable and meters REALLY well. (I have loaded up a couple hundred rounds with that powder and only had 1-2 overthrows with a chargemaster!) See attached links for velocity numbers higher than mine with 208gr Amax's and other high weight 308 loads! These newer powders are achieving 100-150 fps velocity increases in many 308 loads. Don't take my word for it, buy some of your own powder and work it up in your 308. You may be pleasantly surprised with the results! [url]https://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=1366044&page=1[/url] [url=http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=1914964&page=4]Alliants new Power Pro 2000mr - Sniper's Hide Forums[/url] [/QUOTE]
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