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310 yard shooting

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Smitty8141

Smitty8141

Member
Oct 6, 2020
150
2
New Jersey, United States
Finally built my steel plate to place out at 310 yards. It ended up being 24”x22”. Painted it black, a little white at the corners if the sun were going down. 
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Takes about 25 minutes to walk around the lake to get to the target. It’s all marsh. 
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The plate is just off to the right of the tree laying into the water. 
Wind was blowing 5 - 15 mph and cause I’m in a valley the direction swirls. I didn’t even try a 44g pellet. Decided to try a 49.5g Nielsen slug. Took about 3 shots in the water (about 15 yards in front of the target) to figure out where the slug was going. It was shooting about 12” to the right. Now it’s trial an error for holdover. After about 10 more shots I hit it. I was able to hit it 4 times out of about 8 shots in the wind. Problem is I can’t see where the hits are through the scope. Couldn’t believe it. Here is a bad picture, shot through my spotting scope set at 45x. 
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4 hits on the left side of the plate at 310 yards with a Daystate Safari, .30 cal with Nielsen slug. Amazing what we all are doing stretching these things out. Once I get a day with no wind I’ll try for a 44g JSB. 
 
Congrats. Nice place to shoot also nice target, gun and shooting. 100 yds is a big challenge for some of us. Curious to see what the 44's wiil do at that distance.
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The 44g do great out to 240 yards. This is the farthest I’ve tried to stretch them. It still blows my mind they do as well as they do between 200 and 240 yards. When I first started stretching them out, I was positive they’d lose stability because of the diablo shape or coming it of a smooth twist barrel from my Boss. They make clean holes, I was wrong. Have to see what happens to them at 310 yards. It might finally just be too far for them. I’m not sure. 

 
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Fun, fun!

Next time paint the steel white, it makes seeing the splats MUCH easier.

I had very good results with 44's in an EVOL at 289Y and was kinda easy to hit the 210Y chicken. But that barrel didn't like the NSA 47's so I didn't pursue slugs in it.
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It’s funny. My .25 and my .30 don’t shoot the slugs well until I stretch out past 100 yards. They both group about 2-3” at 100 yards with slugs. Both will group sub moa with JSB’s at 100. It’s like the slugs don’t settle in until past 100 yards. Haven’t figured it out yet. Seen a few people report the same thing. 
 
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I have been dealing with lots of slugs that don’t work at 50...but will do proportionally better at 100.


Mike
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Mike, I’m stumped as how this is happening. Is it it possible we are getting a spiral as the slug exits the barrel which tightens up the farther it flies. Almost as if it’s spinning to fast at exit, but tightens as the revolutions slow. Keep in mind, this is an uneducated guess. I’m getting it from 2 guns, a .25 and a .30. The .25 is pushing the 33g slug at about 930 ft/sec and the .30 is shooting the 47g slug at about 860 ft/sec. 
 
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The key word is “proportionally” better. That is measurable and believable. So although groups at 100 can’t be better than 50, they can be proportionally better, say 1/2 inch at 50 could be 3/4 and not 1 inch at 100. Some shooters actually believe the slug groups at 100 can be better or smaller in size than at 50. Unless the slugs have built in guidance systems that’s not going to happen...
 
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I was responding to Smitty....but I have more than enough groups at 50 that are almost the exact same size at 100 from the same gun in back to back conditions. As I said, the key to understanding it is the spiral. The center of a large spiral that decreases to a smaller one is the same. If the spiral gets smaller with distance as often happens with a good spin stabilized projectile...you should be able to see how this is possible.


Mike
 
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I see your point, but it depends of course on the size of the spiral, which from what I can gather from numerous studies, is always or almost always less than the diameter of the slug or bullet. I’m sure you can see my point.

The large groups that you posted 50 and 100 a while back to prove your point were close, but the 100 was definitely larger without measurement... It wasn’t 100% larger, but easy to see definitely larger.
 
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