![]() Weigh what you have, maybe do this with different headstamps to get an idea what accepts the most powder.Īs for the crunch, its called that for a reason. I would attempt to test case capacity first. Hope that is more applicable info to the question. Didn't seem to matter that the round nose was lead tip. I'm sure they'll work ok and accuracy seemed to be ok though not as good as the SMK's but minute of pig is all you normally need.Performance on target was about the same as the SMK, 100yds you peeled the jacket off the bullet and splattered lead on steel, 200yds you squished the whole bullet flat, 300yds it flattened the front half and 400yds about the first third. 7gr more powder to get the same velocity and we figured that was due to the extra contact area on the bullet. The drop at 200 was about 10-12 inches more with the RN compared to the SMK of the same weight. I don't know about wind as we weren't shooting when it was windy. The draggier round nose will drop more and at the ranges we were shooting (up to 400yds) the drop is substantially higher with the round nose. It does make a big difference in ballistics. What I found is that it doesn't seem to make much difference in subsonics what shape the nose is for killing things. I have fired 200gr round nose in the 30-221 thinking they would be better for putting holes in game that would kill them quicker than the spitzer types. It took me a bit to see that you were asking for 220RN info but I did finally see it. If you're only shooting out to 300 it may not make much difference. The only problem with them is that they have more drag and slow down quicker so they don't have the range the slicker HPBT's do. The round nose bullets are normally much shorter and need less spin to remain stable. On the other hand if you want to toss the round nose 220 you would likely be fine. We are shooting 30-221, 300 whisper, 300 blackout using twist rates of 7-8 inchs in order to stabilize these long heavies so 10in isn't really there. Sticking with the lighter bullets for you would make sense from that standpoint. I've done some repairs on suppressors used with that bullet and twist in common. ![]() On the other hand the heaviest bullet may not stabilize and I think with a 10 in twist you're on the edge with a 220 gr bullet with a pointy end and a boattail. Because of that the advantage in the subsonics is normally with the heaviest bullet you can throw. Not really sure if he called EBR about it to see if they would make it right.The whole point behind subsonic shooting is to retain as much energy as possible while reducing noise. I wish he would have recovered the bullet, but he was so upset he just went back home and didn't mess with it. The javelina took off in a run, but didn't get the extra hole in his head my F-I-N was trying to put there. My Father-in-law also shot a javelina in the head at 50yds with the same loaded ammo, (purchased about a year before the ammo mentioned above) and it bounced off the animal. I know they were contacted about it to see if the issue could be resolved but to make a long story short, I believe we still have the ammo but it just sits on the shelf somewhere. I have no idea if the bullet actually expands at subsonic speeds as we were never comfortable enough to use it on a live target. some of the projectiles barely made it to 20 yards before hitting the ground while others actually made it to the paper target at 50yds. 308 loaded ammo from EBR (I believe it was loaded with their thumper bullets) and it was horrible. ![]()
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