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Rifles, Reloading, Optics, Equipment
Reloading
Swift Scirocco II
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<blockquote data-quote="FAL Shot" data-source="post: 469905" data-attributes="member: 27328"><p>I further tested the Scirocco II .224 75-grain on a warmer day with hotter loads. Distance 200 yards. Temperature 40 F. Wind 15 MPH crosswind. Shot one fouling shot, then 2 groups of 3 shots each, then cleaned the bore. There was no indication of keyholing this time.</p><p> </p><p>22.9 grains IMR 4895......1.45"</p><p> </p><p>23.1 grains IMR 4895......1.2"</p><p> </p><p>23.3 grains IMR 4895......1.3"</p><p> </p><p>23.5 grains IMR 4895......1.8"</p><p> </p><p>The test rifle was again my CZ 527 Kevlar Vamint in .223 Rem with 24" by 9" twist heavy barrel. Weaver 3.8-12x44 40/44 series aspherical scope with AO.</p><p> </p><p>The Scirocco II is stable in this rifle at my expected hunting temps at an altitude at or below my expected hunting altitude. The requirement for an 8" twist is to ensure stability in shorter barrels at lower altitudes and lower ambient temps, so the suggested use in an 8" twist rifle is a one-size-fits-all recommendation for worst case conditions, I have concluded. The Lilja website states that their 9" twist match barrels are suitable for bullets up to 75 grains, and I can assume the same for CZ 24" barrels.</p><p> </p><p>My seating depth is .050" off the lands for reliable functioning in the magazine. It doesn't seem to affect the accuracy to a significant degree for hunting purposes per my above results, and it prevents overpressures as well. Primers were in perfect shape with the heaviest load, which would qualify as a max load with military brass used. CCI primers used in all cases.</p></blockquote><p></p>
[QUOTE="FAL Shot, post: 469905, member: 27328"] I further tested the Scirocco II .224 75-grain on a warmer day with hotter loads. Distance 200 yards. Temperature 40 F. Wind 15 MPH crosswind. Shot one fouling shot, then 2 groups of 3 shots each, then cleaned the bore. There was no indication of keyholing this time. 22.9 grains IMR 4895......1.45" 23.1 grains IMR 4895......1.2" 23.3 grains IMR 4895......1.3" 23.5 grains IMR 4895......1.8" The test rifle was again my CZ 527 Kevlar Vamint in .223 Rem with 24" by 9" twist heavy barrel. Weaver 3.8-12x44 40/44 series aspherical scope with AO. The Scirocco II is stable in this rifle at my expected hunting temps at an altitude at or below my expected hunting altitude. The requirement for an 8" twist is to ensure stability in shorter barrels at lower altitudes and lower ambient temps, so the suggested use in an 8" twist rifle is a one-size-fits-all recommendation for worst case conditions, I have concluded. The Lilja website states that their 9" twist match barrels are suitable for bullets up to 75 grains, and I can assume the same for CZ 24" barrels. My seating depth is .050" off the lands for reliable functioning in the magazine. It doesn't seem to affect the accuracy to a significant degree for hunting purposes per my above results, and it prevents overpressures as well. Primers were in perfect shape with the heaviest load, which would qualify as a max load with military brass used. CCI primers used in all cases. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Swift Scirocco II
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