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Hunting
Long Range Hunting & Shooting
22-250 AI 7 twist
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<blockquote data-quote="AZShooter" data-source="post: 1993465" data-attributes="member: 5219"><p>There is something that happens with a 3 groove and a fast twist. BUT bonded or monos can survive the trip once the throat gets rough. </p><p></p><p>My first experience with a 1 in 7 3 groove was with a 7 Rem mag. 180 Berger hunting VLDs were going 3050 fps. After a few hundred through the bore they began to have damaged jackets which caused radical divergence of up to 5 inches from POI at 100 yds. Switching to 180 target bullets with thicker jackets worked for another 100 rounds or so. Then they began to show signs of damage too. </p><p></p><p>Switching to 140 accubond or 140 TTSX solved the issue but BC was disappointingly low. </p><p></p><p>Lesson learned use just enough twist to stabilize a cup and core or use bonded or monos with a 3 groove!</p></blockquote><p></p>
[QUOTE="AZShooter, post: 1993465, member: 5219"] There is something that happens with a 3 groove and a fast twist. BUT bonded or monos can survive the trip once the throat gets rough. My first experience with a 1 in 7 3 groove was with a 7 Rem mag. 180 Berger hunting VLDs were going 3050 fps. After a few hundred through the bore they began to have damaged jackets which caused radical divergence of up to 5 inches from POI at 100 yds. Switching to 180 target bullets with thicker jackets worked for another 100 rounds or so. Then they began to show signs of damage too. Switching to 140 accubond or 140 TTSX solved the issue but BC was disappointingly low. Lesson learned use just enough twist to stabilize a cup and core or use bonded or monos with a 3 groove! [/QUOTE]
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