Author Topic: Cast loads in my 30-06  (Read 300 times)

Offline res45

  • Prepper
  • **
  • Posts: 72
  • Karma: 10
Cast loads in my 30-06
« on: May 12, 2019, 06:10:37 AM »
Recently picked up a Rem. 770 bolt gun in 30-06 and loaded up some test loads for it last week. I was using mixed brass by Win. Rem. and Fed. along with CCI LR primers and I use three different powders Alliant 2400, H-4198 and Unique. The two bullets I used were the Lee 170 gr. FP and the Lee 160 gr. TL RN both powder coated, gas checked and sized to .311". Targets were shot at 50 yds. as that is as far as I can shoot around here in the back yard range without making a day trip to the public range. All load data came from the Lyman Cast Bullet manual #4, below are the group but none were much larger than 1.5" and some under 1". We had some issues with the Chrono not reading probably due to overcast skies on some loads but I will be retesting those loads for data at some point as will as some additional powders I have and maybe even a primer change on a couple loads to see if that improves things. I haven't been behind the trigger since last Nov. after having surgery and weather not cooperating on my days off so I'm a bit rusty.



Target #1
Low: 1698
High: 1715
Average: 1709
Spread: 16.8
SD: 6.78

Target #2
Low: 1731
High: 1761
Average: 1747
Spread: 29.99
SD: 11.61

Target #3
Low: 1950
High: 1981
Average: 1966
Spread: 31.30
SD 11.22

Target #4
Low: 1971
High: 2015
Average: 1989
Spread: 44.64
SD: 16.50

Target #5
No Data but shoots great, will load and shoot again.

Target #6
No Data

Target #7
No Data

Target #8
Low: 2277
High: 2309
Average: 2292
Spread: 31.71
SD: 15.39

Target #9
Low: 1635
High: 1701
Average: 1650
Spread 65.70
SD: 26.57

Target #10
Low: 1665
High: 1709
Average: 1686
Spread: 44.46
SD: 17.49

Offline armymars

  • Survivalist Mentor
  • *****
  • Posts: 810
  • Karma: 23
  • New TSP Forum member
Re: Cast loads in my 30-06
« Reply #1 on: May 12, 2019, 02:29:34 PM »
For data on #5 what does the Lyman book say?

Offline res45

  • Prepper
  • **
  • Posts: 72
  • Karma: 10
Re: Cast loads in my 30-06
« Reply #2 on: May 12, 2019, 07:29:09 PM »
For data on #5 what does the Lyman book say?

Well that load is 2.0 grs. above the starting charge of 25.0 grs.  so I would divide 27.0 into the Max. charge weight of 38.5 which equals 0.70129870.  then I multiply that number by the listed MV of the Max. charge weight in the manual and I get 1727 fps. As a formula it looks like this  27.0 / 38.5 =  0.70129870 x 2463 = 1727 fps.

Of course my barrel is 2" shorter that the barrel length of the test barrel used in the manual and my bullet dia. is .002" larger so we will have to see how it washes out.  I do plan to size some of the bullets down to .309" as well as see if anything changes.