I need a bigger hammer
- Thread starter Ian
- Start date
F
freebullet
Guest
Lord help anyone annoyed by thread swerving wandering to this board.
Some excellent comments either way.
Ian
Glad to hear it will chamber cast. That is a phenomenal start with a PSA bbl, really. Your mention of "grenade hole of powdered bullet" is just the symptom. We are looking for .5-1.5" entrance hole, 2.5-3.5" mostly solid exit hole, with liquified stuff between. When the load is in tune like that the core will penetrate some bone, and shouldn't seperate in to more than 2 or 3 main pcs. The main portion of jacket will usually be found inside the exit side. It gives a 6-12" spalling circle. It is very effective.
Bill
Your friend was speaking truth. I did some extensive work on deer with the 69smk. The final habit, to deliver reliable drt performance was to fire a controlled pair, just like self defense with a handgun. One is effective but, they normally run a bit. A double double lung/vital sequence would drop them on the spot reliable. That's why I switched to the lr308 when I could afford it. The 168smk delivered to the broadside or quartering away vital area at 24-2500fps is much more reliable with one shot, & a controlled pair is undeniably devastating.
It goes back to the animals' situation he's chasing, not just an everyday hunting load.
Some excellent comments either way.
Ian
Glad to hear it will chamber cast. That is a phenomenal start with a PSA bbl, really. Your mention of "grenade hole of powdered bullet" is just the symptom. We are looking for .5-1.5" entrance hole, 2.5-3.5" mostly solid exit hole, with liquified stuff between. When the load is in tune like that the core will penetrate some bone, and shouldn't seperate in to more than 2 or 3 main pcs. The main portion of jacket will usually be found inside the exit side. It gives a 6-12" spalling circle. It is very effective.
Bill
Your friend was speaking truth. I did some extensive work on deer with the 69smk. The final habit, to deliver reliable drt performance was to fire a controlled pair, just like self defense with a handgun. One is effective but, they normally run a bit. A double double lung/vital sequence would drop them on the spot reliable. That's why I switched to the lr308 when I could afford it. The 168smk delivered to the broadside or quartering away vital area at 24-2500fps is much more reliable with one shot, & a controlled pair is undeniably devastating.
It goes back to the animals' situation he's chasing, not just an everyday hunting load.
RBHarter
West Central AR
Paid for the Texas hunts , haven't worked out a situation in Arkansas yet ....
A 45 cal 20" twist is plenty for a 535 sub . I saw a test someplace with a 16" twist ....the guy got up to like 900 gr in a Postell style where he decided he'd had enough abuse in the search for the point of unstable .
Thread wander sometimes finds some nugget of something that is what you needed for something else .
A 45 cal 20" twist is plenty for a 535 sub . I saw a test someplace with a 16" twist ....the guy got up to like 900 gr in a Postell style where he decided he'd had enough abuse in the search for the point of unstable .
Thread wander sometimes finds some nugget of something that is what you needed for something else .
Ian
Notorious member
LR-308 got to stretch its legs today. Freebullet, you're going to be interested.
I threw together a load based on some bullets I had left over from a powder coat quench experiment that didn't go well, 15.4 bhn from ww plus a little tin. After screwing around with ut at 25 yards to get on paper I re-posted the target at 100 and put two over the top, made a big elevation adjustment, and shot the last four for a 1-3/8" group. Estimated velocity somewhere around 2200 fps.
I have to walk 5 yards downrange to recover the brass that's ejecting at about 1:00, and the concussion from shooting it suppressed is rather unpleasant even with glasses and ears. To say it is over-gassed is an understatement and the buffer is trying to hammer a hole through the end of the extension tube. I'm not going to shoot it anymore with this powder until I get an adjustable gas block.
I threw together a load based on some bullets I had left over from a powder coat quench experiment that didn't go well, 15.4 bhn from ww plus a little tin. After screwing around with ut at 25 yards to get on paper I re-posted the target at 100 and put two over the top, made a big elevation adjustment, and shot the last four for a 1-3/8" group. Estimated velocity somewhere around 2200 fps.
I have to walk 5 yards downrange to recover the brass that's ejecting at about 1:00, and the concussion from shooting it suppressed is rather unpleasant even with glasses and ears. To say it is over-gassed is an understatement and the buffer is trying to hammer a hole through the end of the extension tube. I'm not going to shoot it anymore with this powder until I get an adjustable gas block.
F
freebullet
Guest
Glad to hear you made it out to shoot. That's not bad at all for a brand new setup. Our carbine isn't running adjustable, doesn't really seem over the top gas wise. Slightly faster powder maybe?
Maybe it will do under moa w/smk...
On the adjustable... got one from superlative arms last summer for the ar pistol project. It is very nice, if a bit pricey. It allows standard gas reduction/ shut off, it has a bleed off feature, & takes the screw/ hardware out of the gas stream. Is rated for 308.
Was going to head to the range today, my chevy had different plans for me. It thinks an alternator & power steering pump replacement would be more fun.
Maybe it will do under moa w/smk...
On the adjustable... got one from superlative arms last summer for the ar pistol project. It is very nice, if a bit pricey. It allows standard gas reduction/ shut off, it has a bleed off feature, & takes the screw/ hardware out of the gas stream. Is rated for 308.
Was going to head to the range today, my chevy had different plans for me. It thinks an alternator & power steering pump replacement would be more fun.
F
freebullet
Guest
Ours are both @4-5 on ejection to.
The bleed off feature is really nice at reducing recoil/ impusle/ timing issues. With that, I bet you could dial it in without changing other parts.
The bleed off feature is really nice at reducing recoil/ impusle/ timing issues. With that, I bet you could dial it in without changing other parts.
Ian
Notorious member
I run th adjustable plug on my M1A very much open with just about this same load and suppressor. Makes a nice little pile of brass and the rifle just rocks back a little under recoil in a gentle kerchunkachunk motion. I was hoping for the same with this but it is quite violent and harsh. I could switch to 3031 or something but have a lot of 4320 to use up.
F
freebullet
Guest
Honestly, with cast, thinking splody like, hollow points, 18-2k. I don't have anywhere near the experience with those. Have taken several deer with the mp311-159hp, they work splendid. Giving up trajectory, harder to find entry/blow up balance.
I'm not to surprised it wants a little different combo. It's a different creature, just in the same cal. To chamber cast & do so well, first go round is a sign of fun to come. Way to go psa & Ian!
If you ran quickload on just the barrel length difference, it might explain most of it. That don't account for the other differences.
Couple guesses, 35-37gr 4895, rx7 25-31gr, 19-21 4227. I've worked varget backward in the carbine but haven't yet located the notes for minimum function.
I'm not to surprised it wants a little different combo. It's a different creature, just in the same cal. To chamber cast & do so well, first go round is a sign of fun to come. Way to go psa & Ian!
If you ran quickload on just the barrel length difference, it might explain most of it. That don't account for the other differences.
Couple guesses, 35-37gr 4895, rx7 25-31gr, 19-21 4227. I've worked varget backward in the carbine but haven't yet located the notes for minimum function.
So that is a H3 carbine buffer (rifle buffer is longer) and rifle spring? The spring is possibly too long so it bottoms out in a carbine tube. Had that problem in pistol, carbine spring and pistol tube so I cut 3 turns off. Forward ejection IIRC means cycle is too fast - bolt returns to hit the case head and knock it forward, AGB may fix that. Both my uppers (original DPMS) didn't eject forward even before the AGB, I turned it down for LB (overgas is really hard on the LB catch) and a tad more. Yes, can will increase gas but I don't have one. The carbine is LOUD, rifle not too bad. Forgot to ask, pistol or carbine gas? I load 39gr 4895 with 165ish GC cast, works good. I use SLR AGB and tweak the adj after range use to keep them from freezing - except for the pistol that is hard stuck. Hmm, no wind tomorrow, in the 60s - range time.
Last edited:
Arlon
Member
If not already mentioned, they have been making your rifle since the early 50's. It's a Remington model 740 in 30-06.. Later model the 7400... Something about simplicity and stuff that's worked for 50 years still does. If you don't need a scope, there is the M1A or Garand... (-:}
Last edited: