Author Topic: Cast 30-06 hunting story  (Read 1187 times)

0 Members and 1 Guest are viewing this topic.

Offline Veral

  • GBO Sponsor
  • Moderator
  • Trade Count: (1)
  • Senior Member
  • *****
  • Posts: 1675
    • Lead Bullet Technology
Cast 30-06 hunting story
« on: July 02, 2009, 07:34:31 PM »
  Today a customer ordered several 30 cal 185 gr SP1R molds, and when talking over the details a memory of another customers success with this bullet on game came to mind.

  About 12 years ago, the customer had me fit his well used rifle with  the above bullet, which he he said he wanted so he could shoot cheap and not wear the barrel out.   He used my normal fitting procedure, providing a throat slug, and the bullet that fit his rifles throat came out at about 190 gr.  His first loads were with 4831, mild velocities to keep recoil down, and produced just a little over 2100 fps, using air cooled WW bullets.  Accuracy at 100 yards was a consistent 1 inch. 
  I haven't spread this story much, because of the following reasons, but this forum is about cast bullets, and the account is good in that respect.  -- He was a 'Native american' tribal hunter, which is what he decided to use the bullet for, after shooting a few groups.  (I'm not proud of that, and know there aren't many hunters, including me, who think so called Native americans should be able to shoot all the game they want.  My notion is, that anyone born on american soil is native, regardless of mongrel or straight bloodlines. Most of us are mongrel including this hunter, myself and a high percentage of so called 'Native Americans'.  None of us deserve more privelege than his neighbor.)  His hunting score the first summer, was 6 elk plus several deer.  He claimed ranges were out to 300 yards, which seems to far to get expansion, so I'm not saying I believe that yardage.  Yet I'm comfortable believing he shot out to 200 yards at least.  I'd be a fool not to believe that he shot the amount of game which he claimed.  He just wasn't one to ever expand a story.  He said that he never needed more than one shot, and as I recall, he only recovered one bullet, which he brought over and showed me, saying he shot the elk it killed at 200 yards, with a steep quartering shot through the chest.  It was nicely expanded, and was recovered from under the off side skin.  He used that one bullet and load for several years with complete success, stating that he would never shoot another jacketed bullet. 

  In my book I explain how to test your loads for effectiveness on game, often called expansion testing, which he did before hunting with those bullets.  The key to his super success, even though starting velocities were far lower than one would think necessary to get expansion, was the very high B.C, of the relitively heavy SP1R.  Because it loses speed slowly and impact velocity required to expand air cooled wheel weights is only about 1400 fps, performance was faultless.

  As you scramble through our current political arena, to find good hunting bullets, remember this account.  The same is possible with most rifle cartridges from 6.5 caliber and larger, if the throating will allow maximum cast bullet weights which equal maximum jacketed weights for the cartridge.  With shorter ranges, cast bullets with poor ballistic coefficient's can be just as effective, especially for game of 400 pounds and less, so long as impact velocity is high enough to expand them.  Of coarse, as you'll read through out this forum, when the caliber is large enough and the bullet meplat is wide enough to produce an adaquate  Displacement Velocity, no expansion is needed, nor desirable in my opinion. 

   

 
Veral Smith

Offline jk3006

  • Trade Count: (17)
  • Contributor
  • ***
  • Posts: 481
Re: Cast 30-06 hunting story
« Reply #1 on: July 06, 2009, 09:05:18 AM »
Veral,

How does the SP1R differ from your regular spitzer design (with .1 meplat)?  I am curious to know.  I have one of your 180 grain spitzers, so I know what they look like.  Do you know what the ballistic coefficient difference between the two bullets is?

Offline Veral

  • GBO Sponsor
  • Moderator
  • Trade Count: (1)
  • Senior Member
  • *****
  • Posts: 1675
    • Lead Bullet Technology
Re: Cast 30-06 hunting story
« Reply #2 on: July 12, 2009, 07:05:12 PM »
  My regular spitzer is stamped just SP, and has a .6 inch radius ogive.  The SP1R is a one inch radius ogive curve, which gives the bullet a lot more grace in flight.  I don't recommend the SP1R for weights less than 180 gr, because the long nose needs lots of bearing to keep it centered, whereas the SP makes a very accurate bullet in weights down to 140 gr.  This is all 30 caliber talk, but the same ogive is used for all calibers, and I also have a SP.8, which means a .8 inch radius ogive.

  Because ballistic coeficient changes dramatically with weight, and I offer so many weights, and calibers, I've never made an attempt to test for BC of any of my bullets.  In the spitzer offerings though, the SP1R is out front, the .8 comes second, then the sp and finally a SP.5 which is quite tubby and best suited to calibers from 30 down.

  Your 180 gr SP is an excellent hunting bullet which ranges out very well.  I expect its maximum range for expansion would be perhaps 20 % less than the SP1R with both started at the same speed.  However the SP is the toughest bullet LBT offers for getting maximum velocity with accuracy, so the tradeoff isn't too bad, as the extra velocity potential of the SP lets it catch up with the SP1R to a considerable degree.

  I told the story to inspire my readers to try cast for hunting, and give a bit of information on the critical points which are mandatory in getting good results.  You can get good results on game with any cast bullet that is capable of delivering decent velocities with accuracy using an alloy hardness between 12 and 16 bhn.  Just test your loads on water filled plastic jugs at increasing ranges till you no longer get expansion or can't hit a gallon jug consistently.  That will be your maximum effective range for deer sized game.  I set a board or piece of tin behind the jug to see if the bullets expand enough to punch a larger than bullet diameter hole, but the critical thing is that the jug rupture with some violence.  If it just gets a pinhole or cracks a little out from the bullet hole, you are beyond the effective range of the load you have built.  Once you learn what maximum range for expansion is for the load you have, don't shoot unwounded game at ranges beyond that.
Veral Smith