Unless I am trying to do something special. Like trying to get high velocity loads.
I follow the keep it simple loading plan.
I load ALL my 30 cal rifles with range scrap lead boolits sized to .310, gas checked and lubed with what ever is in the sizer.
I load them ahead of 2400, RL-7, 4227, or 5744
I load them to get 1700 fps and be happy
Lyman Cast Bullet Manual.....that's the ticket !
Now that target look a whole lot better.
Well, finally get my 308 load straightened out. Used IMR 4198, loaded up 5 rounds of each 1 grain increment, starting at 22 grains and going up 1 full grain each 5 round group, settled on 24.5 grains as my load, had the best group with good speed, 2005 fps, check out my targets, since my hunting area is only allowing about a 75 yard shot, I sighted the scope at 70 yards, these targets are from 60 yards out
My cost for each 308 round is about 17cents, I can practice a lot that cheap,
Appreciate those who responded and tried to help
Just a quick note, used my new rounds to do some serious gong ringing at the 300 yard range yesterday, great fun at .17 cents per round
Don't sweat copper in the bore. Don't sweat alloy, wwts is fine. Fit grooves by using groove diam +.002 or .003. Use 10 gr or Unique, or 16 gr of 2400, any bullet wt you like. This WILL work.
If it was easy, anybody could do it.
A big thing for me with rifle cast loads was the loss of accuracy from jacketed bullet's. But out to 100 +/- yds, a 2" group will work fine. have a 308 I'm going to shoot them out of, Rem 788 with an 18" barrel. going back to jacketed with the 30-06, 03 Springfield by Paul Jaeger in 1945.
I did use Lee's book for some cast loads, mostly 4064 and I just don't have the gut's to go where he say's, again, I'm not into getting lead out of a barrel just for a few more fps!
Referring to gas check boolits. It is my understanding that boolits come out of the barrel rotating at high speed and that the gas check is thrown off quickly in random directions. Comments?
Gas Checks are crimped on the boolit base and are supposed to stay there. If they come off, the round will be a flyer and not hit where you desire. The gas check rotates as fast as the boolit. The twist rate and boolit velocity determine the rotational velocity.
What happens if the gas check is below the neck? I'm shooting a C309-150-F in my 308, and in order to have all the lube covered by the neck, the gas check is or close to being below the neck.
I'm getting some funnies happening that I can't explain.
the check going into the neck can be pulled to the side giving you an angled base at the muzzle.
or 'worse' [if that's possible] it flies off at random.
I try to seat my boolits out and let them engage the rifling, a nice even [.001-.0015]engraving on the nose is preferred.
it's all an educated guess,,,, till the trigger is pulled.
this opinion brought to you by mister low-tech solution..
If you assume the GC is to eliminate gas cutting and lead is exposed to gas, it gets cut. At least keep the sides of the GC in the neck. High pressure loads can peen the GC into the shoulder, just like Pb.
Keep gas check in neck of case ,get better accuracy if I use heavy crimp with fcd .have never used fillers 2400 is my powder of choice .
I load for the 300 Savage and the check is almost always below the neck. It is what it is and there have been no detrimental effects. If you can keep it in the neck, great. But I don't worry about it.
http://castboolits.gunloads.com/show...velocity-chart). Powder coating may exceed that threshold. Personally, I don't want to mess with PC, so I shoot my 30 cal's @18-1900 and enjoy it! The deer don't seem to mind that my bullets aren't Mach 2+!
"All who wander are not lost."
My Lyman 311291 puts the check below the neck which I never cared for but never had a problem with it. The 311299 and RCBS 160 Sil doesn't, you might what to look at those two moulds.
|BP||Bronze Point||IMR||Improved Military Rifle||PTD||Pointed|
|BR||Bench Rest||M||Magnum||RN||Round Nose|
|BT||Boat Tail||PL||Power-Lokt||SP||Soft Point|
|C||Compressed Charge||PR||Primer||SPCL||Soft Point "Core-Lokt"|
|HP||Hollow Point||PSPCL||Pointed Soft Point "Core Lokt"||C.O.L.||Cartridge Overall Length|
|PSP||Pointed Soft Point||Spz||Spitzer Point||SBT||Spitzer Boat Tail|
|LRN||Lead Round Nose||LWC||Lead Wad Cutter||LSWC||Lead Semi Wad Cutter|