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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 cal 265grn wildcat bullet test
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<blockquote data-quote="Black Diamond 408" data-source="post: 162225" data-attributes="member: 1563"><p>I got some of Richards bullets to test in my 338 Snipe-Tac, he sent 265gn and 300grn bullets. I dont think the 300's will work in my bbl so i didnt fire any of those yet. </p><p></p><p>I loaded up 6 rounds to sight in with at 100yds, the gun was sighted with 300MK's dead on. The first group was 2" high, about 1" three shots. I lowered the scope 2 MOA, next group was dead center but about 1 1/4" size.</p><p>Not what i was hoping for as the SMK bullets shoot in the low .2's. I figured the slower twist im using is causing the problem. The bullet holes are round so that was a plus. The initial loads were 145grns of H-BMG50, that produced 3500fps. The cases ejected easy but the primers were just a bit flatened.</p><p></p><p>I talked with Barney Lawton about my tests and he said if the holes were round then there prolly is a load that will make the bullets work. I pondered, maybe im driving them to fast? Sometimes 100yd groups are very decieving, what shoots good at 100 dont nessesarly shoot good at long distances, and visa versa. So i decided to do a long range test to see how the groups react.</p><p></p><p>I lasered a distance and set up a target stand, 703 yards. I loaded up three different powders, all are a bit different in burn rates. fastest to slowest,</p><p> US869....H-BMG50...WC872 </p><p>I have used all three of these in testing with the 300MK, the 265 Alum tipped bullet has a long baring surface so the same loads were used to start with.</p><p></p><p>My gun loves WC872 with the 300MK, 143grns = 3300fps </p><p>Test rifle</p><p> Viersco stainless repeater action</p><p> Lone Wolf carbon stock</p><p> Lawton 33" 1-11.25 twist bbl</p><p> 30moa base</p><p> IOR 6-24x50 35mm tube scope</p><p>---------------------------------</p><p>I loaded up three 143 WC872</p><p>Testing:</p><p>Average speed, 3400fps</p><p>SD 16</p><p>Group size 703yds 7" </p><p>--------------------------------</p><p>Next test group</p><p>140grns WC872</p><p>Speed 3337</p><p>SD 9</p><p>Group size 703yds 6"</p><p>--------------------------------</p><p>H-BMG 50 powder</p><p>140grns </p><p>Speed 3407</p><p>SD 18</p><p>Group size 703 6"</p><p>--------------------------------</p><p>H-BMG 50 </p><p>142grns</p><p>speed 3450</p><p>SD 9</p><p>Group size 703yds 4.5"</p><p>--------------------------------</p><p>US869 powder</p><p>140grns</p><p>speed 3437</p><p>SD 3</p><p>Group size 3.2"</p><p>----------------------------------</p><p>The faster burning powders seemed to do a better job accuracy wise. Several groups were at or just under 1/2 moa at the 703 yard target. </p><p>All loads were tested with TTi armory brass.</p><p></p><p>The Exbal program was very close in predicting the needed MOA, tests ranged from 7 moa to 8moa, depending on the load used. Every test shot found the target, it was a 2 foot square target board.</p><p></p><p><a href="http://www.hunt101.com/?p=510921&c=500&z=1" target="_blank"><img src="http://www.hunt101.com/img/510921.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p><a href="http://www.hunt101.com/?p=510922&c=500&z=1" target="_blank"><img src="http://www.hunt101.com/img/510922.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p><a href="http://www.hunt101.com/?p=510923&c=500&z=1" target="_blank"><img src="http://www.hunt101.com/img/510923.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p>I also tested the accuracy of my small chrono vs the Ohler 34, They were with in 8-10 fps on every shot.</p><p></p><p>My next test i will set up the chrono at 700yds and see what the speed is at that distance. </p><p></p><p>there will be some test results coming with a faster twist barrel and the 300grn AT Wildcats.</p><p></p><p>Dave</p></blockquote><p></p>
[QUOTE="Black Diamond 408, post: 162225, member: 1563"] I got some of Richards bullets to test in my 338 Snipe-Tac, he sent 265gn and 300grn bullets. I dont think the 300's will work in my bbl so i didnt fire any of those yet. I loaded up 6 rounds to sight in with at 100yds, the gun was sighted with 300MK's dead on. The first group was 2" high, about 1" three shots. I lowered the scope 2 MOA, next group was dead center but about 1 1/4" size. Not what i was hoping for as the SMK bullets shoot in the low .2's. I figured the slower twist im using is causing the problem. The bullet holes are round so that was a plus. The initial loads were 145grns of H-BMG50, that produced 3500fps. The cases ejected easy but the primers were just a bit flatened. I talked with Barney Lawton about my tests and he said if the holes were round then there prolly is a load that will make the bullets work. I pondered, maybe im driving them to fast? Sometimes 100yd groups are very decieving, what shoots good at 100 dont nessesarly shoot good at long distances, and visa versa. So i decided to do a long range test to see how the groups react. I lasered a distance and set up a target stand, 703 yards. I loaded up three different powders, all are a bit different in burn rates. fastest to slowest, US869....H-BMG50...WC872 I have used all three of these in testing with the 300MK, the 265 Alum tipped bullet has a long baring surface so the same loads were used to start with. My gun loves WC872 with the 300MK, 143grns = 3300fps Test rifle Viersco stainless repeater action Lone Wolf carbon stock Lawton 33" 1-11.25 twist bbl 30moa base IOR 6-24x50 35mm tube scope --------------------------------- I loaded up three 143 WC872 Testing: Average speed, 3400fps SD 16 Group size 703yds 7" -------------------------------- Next test group 140grns WC872 Speed 3337 SD 9 Group size 703yds 6" -------------------------------- H-BMG 50 powder 140grns Speed 3407 SD 18 Group size 703 6" -------------------------------- H-BMG 50 142grns speed 3450 SD 9 Group size 703yds 4.5" -------------------------------- US869 powder 140grns speed 3437 SD 3 Group size 3.2" ---------------------------------- The faster burning powders seemed to do a better job accuracy wise. Several groups were at or just under 1/2 moa at the 703 yard target. All loads were tested with TTi armory brass. The Exbal program was very close in predicting the needed MOA, tests ranged from 7 moa to 8moa, depending on the load used. Every test shot found the target, it was a 2 foot square target board. [url="http://www.hunt101.com/?p=510921&c=500&z=1"][img]http://www.hunt101.com/img/510921.JPG[/img][/url] [url="http://www.hunt101.com/?p=510922&c=500&z=1"][img]http://www.hunt101.com/img/510922.JPG[/img][/url] [url="http://www.hunt101.com/?p=510923&c=500&z=1"][img]http://www.hunt101.com/img/510923.JPG[/img][/url] I also tested the accuracy of my small chrono vs the Ohler 34, They were with in 8-10 fps on every shot. My next test i will set up the chrono at 700yds and see what the speed is at that distance. there will be some test results coming with a faster twist barrel and the 300grn AT Wildcats. Dave [/QUOTE]
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338 cal 265grn wildcat bullet test
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