[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-347627-105":3,"detail-sidebar-cat-0-en-105":81,"doc-detail-347627-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":74,"head_meta":76,"extra_data":78,"updated_unix":80},105,"en","bench-topics-57-lr-bench-topics-alliant-reloder-17-cartridges-and-load-testing-notes","Bench Topics% 57% LR - Bench Topics - Alliant Reloder 17 Cartridges and Load Testing Notes","","Bench Topics by Richard Mann evaluates Alliant Reloder 17 rifle powder against IMR-4350, focusing on measuring consistency, velocity, and practical load development across multiple cartridges. Tests used RCBS equipment and digital weighing to compare average charge weights and deviations, then developed loads for .308 Winchester and .243 Winchester, with additional work on .257 Roberts +P and .264 Winchester Magnum. Observations cover velocity differences, primer selection, and temperature sensitivity, concluding with guidance on achieving similar performance when factory data is unavailable.",{"@graph":14,"@context":73},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/healthcare/","Healthcare",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/bench-topics-57-lr-bench-topics-alliant-reloder-17-cartridges-and-load-testing-notes/347627/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/bench-topics-57-lr-bench-topics-alliant-reloder-17-cartridges-and-load-testing-notes/347627.png","ImageObject",300,407,{"name":42,"@type":43},"Ben ","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-31","2026-09-22",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",8,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69],{"name":60,"@type":61,"acceptedAnswer":62},"How did the testing compare Reloder 17 with IMR-4350 for metering consistency?","Question",{"text":63,"@type":64},"Ten charges of each powder were thrown on an RCBS powder measure and weighed using an RCBS Chargemaster digital scale. Reloder 17 averaged 28.62 grains with a maximum deviation of 0.5 grain, while IMR-4350 averaged 27.53 grains with a maximum deviation of 0.7 grain.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"What were the key findings for .308 Winchester load development using Reloder 17?",{"text":68,"@type":64},"The article reports load development for 150-grain and 180-grain bullets, including velocities up to 2,863 fps with a 50.0-grain charge. It also notes that the author’s primer choice differed from the Alliant data (CCI Bench Rest primers vs Federal 210 primers) and that tested velocities were faster than the listed reference loads.",{"name":70,"@type":61,"acceptedAnswer":71},"How did temperature affect performance in the .257 Roberts +P test?",{"text":72,"@type":64},"Several .257 Roberts +P loads were chilled to about 30°F after initial loading. Point of impact at 100 yards did not change, but velocity dropped by 133 fps and standard deviation more than doubled compared with the 82°F loads.","https://schema.org",{"og:url":32,"og:type":75,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":77,"canonical":32},"index,follow",{"doc_id":79,"site_id":7},347627,1790243264,{"code":4,"msg":82,"data":83},"success",[84,88,92,96,101,106,110,114,119,122,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":85,"show_sort_weight":86,"slug":87},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":89,"show_sort_weight":90,"slug":91},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":93,"show_sort_weight":94,"slug":95},"Exam",70,"exam",{"id":97,"doc_module":4,"doc_module_name":25,"category_name":98,"show_sort_weight":99,"slug":100},5,"Comic",60,"comic",{"id":102,"doc_module":4,"doc_module_name":25,"category_name":103,"show_sort_weight":104,"slug":105},6,"Technology",50,"technology",{"id":107,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":108,"slug":109},7,40,"healthcare",{"id":55,"doc_module":4,"doc_module_name":25,"category_name":111,"show_sort_weight":112,"slug":113},"Research & Report",30,"research-report",{"id":115,"doc_module":4,"doc_module_name":25,"category_name":116,"show_sort_weight":117,"slug":118},9,"Religion & Spirituality",20,"religion-spirituality",{"id":117,"doc_module":4,"doc_module_name":25,"category_name":120,"show_sort_weight":117,"slug":121},"World Cup","world-cup",{"id":123,"doc_module":4,"doc_module_name":25,"category_name":124,"show_sort_weight":123,"slug":125},10,"Lifestyle","lifestyle",{"id":127,"doc_module":4,"doc_module_name":25,"category_name":128,"show_sort_weight":97,"slug":129},19,"General","general",{"code":4,"msg":82,"data":131},{"doc_id":79,"user_id":132,"nickname":42,"user_avatar":133,"doc_module":4,"category_id":107,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":30,"language":139,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":12,"update_tm":143,"read_time":55},2336478951081,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","Bench Topics  \nby Richard Mann  \nAlliant Reloder 17  \n Alliant recently released a  \nnew rifle powder called Re  \nloder 17. The company claims this cylindrical (stick) powder meters easily and consistently while providing maximum velocity, even in extreme weather. It is primarily intended for short-magnum cartridges but will also work with medium rifle loads. Alliant claims Reloder 17 has a burn rate similar to IMR-4350 but with added velocity. The Alliant website lists load data for 22 different cartridges from .223 WSSM to .338 Winchester Magnum. To test the powder using Alli-  \nReloder 17 (left) is a cylindrical powder just like IMR-4350 (right), but the sticks are shorter. This helps Reloder 17 meter more consistently through a powder measure.  \nant data, handloads were developed for the .243 and .308 Winchesters. Loads were also worked up for the.257 Roberts and the .264 Winchester Magnum, for which Alliant has no data. Before load development began, a test was conducted to see if Reloder 17 would meter more consistently than IMR-4350 .  \nUsing an RCBS powder measure, 10 charges of Reloder 17 and 10 charges ofIMR-4350 were thrown and then weighed on an RCBS Chargemaster digital scale. Reloder 17 charges had an average weight of 28.62 grains with a maximum deviation of 0.5 grain. Using the same setting on the powder dispenser, IMR-4350 charges averaged 27.53 grains with a maximum deviation of 0.7 grain.  \nIt appears Reloder 17 does meter more consistently than IMR-4350 . Still, when working with maximum loads, setting your powder measure to throw a charge 0.5 grain under maximum might be a good idea. This is one reason I have become  \nso fond of spherical powders like Ramshot Hunter, which also has a burn rate similar to IMR-4350 . Generally, it will meter to within ±0.10 grain.  \n.308 Winchester  \nThe first Reloder 17 loads developed were for the .308 Winchester using data from the Alliant website. This data is also available on LoadData. com. For a Speer 150-grain boat-tail softpoint (BTSP) bullet, the maximum load listed was 50.0 grains. The first cartridge was loaded with a 150-grain Swift Scirocco II bullet and 48.0 grains of RL-17 . Resulting velocity was 2,763 fps. The same bullet ahead of 49.0 grains left the 26-inch barrel of a T/C Encore at 2,782 fps and 50.0 grains produced an average velocity of 2,863 fps, exactly 100 fps faster than the velocity listed in the Alliant data for the Speer bullet.  \nSwitching to a 180-grain Nosler Ballistic Tip, I worked up to Alliant’s maximum 180-grain bullet  \n[1](1 LoadData.com)[ LoadData.com](1 LoadData.com)  \nload of 48.7 grains. At that charge weight, velocity averaged 2,718 fps, 77 fps faster than what Alliant lists for a 180-grain Speer BTSP. All Alliant .308 Winchester data was developed with Federal 210 primers. My loads were put together with CCI Bench Rest primers.  \n.243 Winchester Alliant’s .243 Winchester data is [also available on LoadData.com](also available on LoadData.com).  \nThe maximum charge for an 80-grain Speer softpoint is 44.0 grains. Working up to that charge weight with an 80-grain Barnes Tipped Triple-Shock, the resulting velocity averaged a neat 3,400 fps, which was 38 fps faster than the Alliant data for the Speer bullet. Out of the same rifle, a New Ultra Light Arms Model 20 with a 22-inch barrel, the same bullet ahead of 46.5 grains ofIMR-4350 averaged 3,336 fps – and 3,360 fps when loaded ahead of 47.2 grains of Hunter.  \nAlliant did not list data for a 90-grain bullet, but 46.8 grains of Ramshot Hunter produced a velocity of 3,190 fps with a 90-grain Nosler Ballistic Tip out of this rifle. Reducing that charge weight by about 10 percent, to 42.0 grains, produced an average velocity of  \n3,190 fps with Reloder 17. For what it’s worth, Nosler lists 43.5 grains as a maximum IMR-4350 load with this bullet.  \n.257 Roberts +PAlliant has no data for the .257  \nRoberts, but out of my Cooper Model 22, 48.0 grains ofIMR-4350 launches a 90-grain Sierra boa","cbCaipYAdKkAL401","https://ap.wps.com/l/cbCaipYAdKkAL401","pdf",472878,"English","# Benchmark powder comparison and consistency testing\n## RCBS charge measurement method\n## Velocity and deviation results\n# Cartridge load development\n## .308 Winchester loads and velocities\n## .243 Winchester loads and velocities\n## .257 Roberts +P temperature sensitivity\n## .264 Winchester Magnum group accuracy\n# Conclusions and guidance","[{\"question\":\"How did the testing compare Reloder 17 with IMR-4350 for metering consistency?\",\"answer\":\"Ten charges of each powder were thrown on an RCBS powder measure and weighed using an RCBS Chargemaster digital scale. Reloder 17 averaged 28.62 grains with a maximum deviation of 0.5 grain, while IMR-4350 averaged 27.53 grains with a maximum deviation of 0.7 grain.\"},{\"question\":\"What were the key findings for .308 Winchester load development using Reloder 17?\",\"answer\":\"The article reports load development for 150-grain and 180-grain bullets, including velocities up to 2,863 fps with a 50.0-grain charge. It also notes that the author’s primer choice differed from the Alliant data (CCI Bench Rest primers vs Federal 210 primers) and that tested velocities were faster than the listed reference loads.\"},{\"question\":\"How did temperature affect performance in the .257 Roberts +P test?\",\"answer\":\"Several .257 Roberts +P loads were chilled to about 30°F after initial loading. Point of impact at 100 yards did not change, but velocity dropped by 133 fps and standard deviation more than doubled compared with the 82°F loads.\"}]","Bench Topics% 57% LR - Bench Topics - Alliant Reloder 17 Cartridges and Load Testing Notes | PDF",1790068242]