Brass from 300 gr. rated at 1950 FPS. A little over pressure ?
http://img.tapatalk.com/d/14/04/25/muqu3uty.jpg
Sent from my ass using re-fried beans.
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Brass from 300 gr. rated at 1950 FPS. A little over pressure ?
http://img.tapatalk.com/d/14/04/25/muqu3uty.jpg
Sent from my ass using re-fried beans.
Doesn't look too bad, not sure how it would affect the ability to reload it though. Maybe you should post it or a link to here in the reloading thread to get some extra opinions. The 300 gr rounds I have are rated to 1800 fps instead of 1950.
The others I have are 400 gr, and all of mine are JHP. I have been thinking about the heavier ones as hunting rounds, but last night I got to thinking that most 400 gr+ rounds are slower (1500 FPS range) and I was worried that this might affect accuracy at longer distances since it might drop more past 100 yards than a faster 300 gr round. Anyone have thoughts on it?
Just using a quick online ballistics calculator,
300g, .302bc, 1800fps = -12.5" at 200 yards with a 100 yard zero
400g, .302bc, 1500fps = -18.6" at 200 yards with a 100 yard zero
Personally, I don't anticipate needing more than 300g to take down anything in North America within 200 yards.
I plan to use the >350g bullets for primarily subsonic purposes.
Yeah, that's a hell of an extra drop at 200 yards. Might rethink my choices. Been getting different rounds mostly because I've just bought as I get emails saying something in .458 is available.Quote:
Originally Posted by davsel
What calculator are you using? Is it online or one you have downloaded?
At least with the .450BM (should be similar) as long as I keep about 1300 fps with the heavies, the accuracy stays pretty much straight MOA. I hope to be tossing 300s and 320s arond 2400 to 2500 or so in a few weeks once I get the .450 BM/C all dialed in.
I just Googled "ballistics calculator" and chose this one:
http://www.federalpremium.com/ballistics_calculator/
I was just guessing on the bc for those two rounds.
It would be an even greater spread if you are using pointed 300g (Barnes Tac-TX) vs. flat nosed 400g.
I loaded up my first 10 rounds last night and plan to set them off this evening.
Hodgdon BL-C(2) is the only powder I have on hand that I could even find loading data for the .458 SOCOM.
I also only have standard large pistol primers - not magnum.
I extrapolated from a few different charts and came up with this as a first go:
48g BL-C(2)
CCI 300
350g Hornady InterLock flat nose
Already did awhile back, it didn't get very many responses. I was just wondering if this was an RRA bolt/upper problem, or just an over pressure problem.Quote:
Originally Posted by Dave
https://www.ar-15.co/threads/116051-...d-Gouged-Brass
Now, that was fun!
Just lobbed 3 rounds down range, got the scope sighted in.
Ran flawless, no signs of over-pressure.
I'll save the rest for tomorrow when my buddy brings up his chronograph.
I like it!
Well, upon further inspection, I may have found an issue with this $300 billet upper.
Here's a copy of what I just sent to Wilson Combat:
I'll wait to see what they say before getting excited.Quote:
I recently purchased your .458 SOCOM Billet upper. I fired 3 rounds today and upon inspection, I noticed a couple of silver specks in the top of the ejection port. I scraped at them with my fingernail, and they got bigger.
Does this billet upper have machining done to the ejection port after anodizing and then simply painted black?
I assumed the .458 billet upper they are selling would have been machined before anodizing - they even have ".458 SOCOM" engraved into the left side of it.
I even have one of Jay's uppers just sitting on a shelf - didn't want to have it machined and then painted over.
[Mad]