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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7mm stw vs 7mm rum?
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<blockquote data-quote="dakor" data-source="post: 195470" data-attributes="member: 2204"><p><strong>7mm STW</strong></p><p></p><p>Accuracy in an STW will not be an issue I have worked up different loads for 6 different rifles and they all have shot 1/2moa or less. As for speed you can expect 3100 to 3200 fps with 175gr and 180gr bullets and 3300 to 3400fps with 160gr type bullets. Right now I have a LSR with a 28inch Broughton 5c barrel and am shooting a berger 180 at 3125fps with and ES of 5 and a 175 SMK at 3205fps with an ES of 6. With the same 20 cases I fired them 6 times before I switched to new ones so both loads are pretty mild. I did shoot the berger at 3200 fps but it did not shoot as well 3/4moa the 3125fps load shoots between 1/4 and 1/2 moa depending on how I shoot that day.</p><p><img src="http://www.hunt101.com/data/500/thumbs/6244LSR_7mm_STW_180_Berger_100_yards_3shots_H-1000_79gr.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p>Here is a 3 shot group at 100 yards with the 180 Berger.</p><p></p><p><img src="http://www.hunt101.com/data/500/thumbs/6244LSR_7mm_STW_180_Berger_300_Yards_4_shots_off_Bipod.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p>Here are two groups at 300 yards off the bipod. The first group is on the bottom and the one up high in that group was the first shot with oil in the barrel. The second group is up higher because I put a click on the scope two shots are in the same hole and the third is about an inch away. I blame the conditions for that one. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> I would say a 30inch barrel in a STW would have no trouble at all shooting 180's 3200fps+. As for range 700 to 800 yards is just the tip of the Iceberg with the load I have at 3125fps with the 180 Berger at 7500ft at 1200 yards 1886fps with 1422ftlbs with 59inch of wind drift with a 10mph wind. At 1500 yards 1635fps and 1068ftlbs with 99inch's of wind drift in a 10mph wind. We all know that these numbers change day to day even with the best Ballistics calc but if you can put the bullet where it needs to go Elk sized game or smaller are going to have a very bad day at 1500 yards or less.</p></blockquote><p></p>
[QUOTE="dakor, post: 195470, member: 2204"] [b]7mm STW[/b] Accuracy in an STW will not be an issue I have worked up different loads for 6 different rifles and they all have shot 1/2moa or less. As for speed you can expect 3100 to 3200 fps with 175gr and 180gr bullets and 3300 to 3400fps with 160gr type bullets. Right now I have a LSR with a 28inch Broughton 5c barrel and am shooting a berger 180 at 3125fps with and ES of 5 and a 175 SMK at 3205fps with an ES of 6. With the same 20 cases I fired them 6 times before I switched to new ones so both loads are pretty mild. I did shoot the berger at 3200 fps but it did not shoot as well 3/4moa the 3125fps load shoots between 1/4 and 1/2 moa depending on how I shoot that day. [img]http://www.hunt101.com/data/500/thumbs/6244LSR_7mm_STW_180_Berger_100_yards_3shots_H-1000_79gr.JPG[/img] Here is a 3 shot group at 100 yards with the 180 Berger. [img]http://www.hunt101.com/data/500/thumbs/6244LSR_7mm_STW_180_Berger_300_Yards_4_shots_off_Bipod.JPG[/img] Here are two groups at 300 yards off the bipod. The first group is on the bottom and the one up high in that group was the first shot with oil in the barrel. The second group is up higher because I put a click on the scope two shots are in the same hole and the third is about an inch away. I blame the conditions for that one. :-) I would say a 30inch barrel in a STW would have no trouble at all shooting 180's 3200fps+. As for range 700 to 800 yards is just the tip of the Iceberg with the load I have at 3125fps with the 180 Berger at 7500ft at 1200 yards 1886fps with 1422ftlbs with 59inch of wind drift with a 10mph wind. At 1500 yards 1635fps and 1068ftlbs with 99inch's of wind drift in a 10mph wind. We all know that these numbers change day to day even with the best Ballistics calc but if you can put the bullet where it needs to go Elk sized game or smaller are going to have a very bad day at 1500 yards or less. [/QUOTE]
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