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Rifles, Reloading, Optics, Equipment
Shotguns
12ga,10ga,8ga,4ga FH;585HE/700HE, other Big Bores--
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<blockquote data-quote="hubel458" data-source="post: 840670" data-attributes="member: 6474"><p>One of our sabot testers with tight barrel, Abolt, with wide lands in </p><p>the barrel, who couldn't do any good at all with our sabot and Alliant Steel </p><p>and one type of slug, had to go to IMR 4759.</p><p> It would twist up the sabot petals. Terrible accuracy.</p><p></p><p> My guns have NEF/Sav size barrels and worked fine with Steel as well as 4759. </p><p>Petals open perfect. The Abolt barrel is about .005" smaller than NEF/Sav and </p><p>the lands over twice as wide as the NEF. And has real narrow grooves.</p><p>Guys with Nefs say sabots open fine like ours here.</p><p></p><p> He went to different Minie slug and our slow powder loads using </p><p>IMR 4759 powder up to 78-79 gr and finally got down to 2.5" group, I told him </p><p>go to max which is about 80-82 in 3" case.That barrel is like a lot of </p><p>EU made barrels and many are replacement or add on barrels in many slug guns, </p><p>and that is reason why it is so hard to get accuracy across the board in </p><p>sabot shooting in all guns--Takes a lot of work.. Another tester with NEF 12ga using</p><p>Alliant Steel with sabots got good groups like we did here. I tell guys if</p><p>problems occur go to 4759.</p><p></p><p>What was happening to sabot petals in the barrel, with the extra tight fit and </p><p>wide lands were petals twisting.. The wide lands were not cutting into the base of</p><p>sabot like in NEF/Sav210 barrels. The twist effect of rifling was on the surface </p><p>of petals, twisting them. It was not getting good hold on the sabot body. The </p><p>4759 starting slower allowed the sabot to get its spin started up to speed </p><p>with the wide land rifling and narrow grooves..It is just the opposite of </p><p>way NEF/Sav 12ga barrels are done. with narrow lands which impress into</p><p>the sabot base the way it is supposed to work..I showed pics above of the</p><p>good rifling marks impressed into our sabots.</p><p></p><p>I think after this experimenting run I feel that a lot of accuracy problems</p><p>across the spectrum of barrels are due to barrel differences, and not just</p><p>the differences in factory slugs and/or reloading components.</p><p></p><p>Here is pic of bag of our 585 cases with plain head if some need them for</p><p>wildcatting.We have quite a few. Fifteen have 585HE cases now. 585 gun</p><p>building is accelerating. We can get folks going with 100 cases, dies, and soon</p><p>a barrel; and shipping, for 750...Ed</p><p></p><p><img src="http://www.gunownerstv.com/585plain.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="hubel458, post: 840670, member: 6474"] One of our sabot testers with tight barrel, Abolt, with wide lands in the barrel, who couldn't do any good at all with our sabot and Alliant Steel and one type of slug, had to go to IMR 4759. It would twist up the sabot petals. Terrible accuracy. My guns have NEF/Sav size barrels and worked fine with Steel as well as 4759. Petals open perfect. The Abolt barrel is about .005" smaller than NEF/Sav and the lands over twice as wide as the NEF. And has real narrow grooves. Guys with Nefs say sabots open fine like ours here. He went to different Minie slug and our slow powder loads using IMR 4759 powder up to 78-79 gr and finally got down to 2.5" group, I told him go to max which is about 80-82 in 3" case.That barrel is like a lot of EU made barrels and many are replacement or add on barrels in many slug guns, and that is reason why it is so hard to get accuracy across the board in sabot shooting in all guns--Takes a lot of work.. Another tester with NEF 12ga using Alliant Steel with sabots got good groups like we did here. I tell guys if problems occur go to 4759. What was happening to sabot petals in the barrel, with the extra tight fit and wide lands were petals twisting.. The wide lands were not cutting into the base of sabot like in NEF/Sav210 barrels. The twist effect of rifling was on the surface of petals, twisting them. It was not getting good hold on the sabot body. The 4759 starting slower allowed the sabot to get its spin started up to speed with the wide land rifling and narrow grooves..It is just the opposite of way NEF/Sav 12ga barrels are done. with narrow lands which impress into the sabot base the way it is supposed to work..I showed pics above of the good rifling marks impressed into our sabots. I think after this experimenting run I feel that a lot of accuracy problems across the spectrum of barrels are due to barrel differences, and not just the differences in factory slugs and/or reloading components. Here is pic of bag of our 585 cases with plain head if some need them for wildcatting.We have quite a few. Fifteen have 585HE cases now. 585 gun building is accelerating. We can get folks going with 100 cases, dies, and soon a barrel; and shipping, for 750...Ed [IMG]http://www.gunownerstv.com/585plain.jpg[/IMG] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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