.308 reloading

[bluesilver]

no idea..........

[J-cat]

According to this:

https://thefiringline.com/forums/showthread.php?t=579820

HSM weighs 180grs whereas RP cases weigh 165. So your loads will generate more pressure.

[rm1911]

[stevec223]

Who makes your 150gr sp bullet ???.. Check out their website or reloading manual,,, and see if they tested with 2015.... If they did but used Rem,, Win or Federal brass (commercial brass) ,,, subtract 1 to 1.5 grains from their listed minimum to maximum ,,, and start at minimum and work up...Your brass is heavy,, treat it like military 308 brass and download the powder charge to be safe... A ladder test up from the minimum,,,by .05 grains ,,,,and check for pressure signs...
Cheers....

[Sir Toast]

Go to the Accurate website. See what they say about using it with .308 or 150 grain bullets. If Accurate doesn't support it, (they probably do), then I wouldn't use it. Go with another powder. Varget or something.

[Sir Toast]

I got this off Accurate's website for 308 winchester:

ACCURATE 2015
110
BARNES
TTSX
40.8
2,884 45.4
3,140 53,192
2.700
C
140
BARNES
MPG
36.7
2,481 40.8
2,775 61,806
2.800
C
150
HDY
SST
38.1
2,558 42.4
2,795 61,878
2.735
C
150
HDY
BT-FMJ
38.6
2,604 42.8
2,829 61,657
2.735
C
150
NOSLER
A-BOND
37.9
2,545 42.1
2,774 61,813
2.810
C
150
SIERRA
SBT GK
38.8
2,590 43.1
2,815 61,265
2.750
150
SPEER
SPZSP
38.9
2,563 43.3
2,785 61,099
2.700
C
150
BARNES
MRX-BT
38.1
2,540 42.3
2,796 61,229
2.785
C
150
NOSLER
E-TIP
37.1
2,465 41.2
2,690 61,555
2.810
C
155
BERGER
VLD
37.6
2,510 41.8
2,741 61,450
2.810
155
HDY
A-MAX
37.2
2,478 41.3
2,706 61,605
2.810
155
SIERRA
HPBT MK
37.6
2,505 41.8
2,725 60,489
2.775
165
NOSLER
PART
37.1
2,423 41.2
2,631 61,499
2.810
165
BARNES
MRX-BT
36.3
2,334 40.3
2,583 61,347
2.785
168
BERGER
VLD
36.1
2,377 40.1
2,603 61,772
2.810
168
HDY
A-MAX
35.6
2,340 39.5
2,567 61,294
2.800
168
NOSLER
HPBT-CC
36.6
2,380 40.7
2,597 61,358
2.810
168
SIERRA
HPBT MK
35.8
2,368 39.8
2,575 61,222
2.800
168
BARNES
TSX-BT
35.6
2,237 39.6
2,482 61,525
2.810
168
NOSLER
E-TIP
35.5
2,264 39.4
2,474 61,559
2.810
175
BERGER
BTTLR
35.6
2,280 39.5
2,515 61,334
2.810
175
NOSLER
HPBT-CC
35.6
2,312 39.6
2,510 61,557
2.810
175
SIERRA
HPBT MK
35.9
2,279 39.9
2,509 61,389
2.800
180
HDY
SST
36.0
2,262 40.0
2,487 61,099
2.740
C
180
SIERRA
HPBT MK
35.6
2,230 39.5
2,456 61,609
2.800
180
SIERRA
SPT PH
36.2
2,245 40.2
2,431 61,686
2.800
180
SPEER
GSLAM
35.7
2,233 39.7
2,433 61,441
2.742
180
BARNES
TSX-BT
36.0
2,200 40.0
2,429 61,849
2.810
C
180
NOSLER
E-TIP
35.1
2,174 39.0
2,379 61,469
2.810
C
185
BERGER
BTTLR
35.9
2,230 39.9
2,457 61,463
2.810
C
190
HDY
BTSP
35.4
2,192 39.3
2,398 61,116
2.745
190
NOSLER
HPBT-CC
35.5
2,228 39.5
2,434 61,584
2.810
200
SIERRA
HPBT MK
34.1
2,091 37.9
2,303 61,399
2.800
200
BARNES
TSX-FB
34.2
1,978 38.0
2,201 61,791
2.810
C
208
HDY
BTHP-M
34.0
2,086 37.8
2,297 61,108
2.810
C
210
BERGER
VLD
32.8
1,991 36.5
2,218 61,286
2.810

[Sir Toast]

Sorry man. It didn't copy and paste the same. Go to Accurate's website. The load data is there. You're good. Just check the website.

[bluesilver]

the bullets are 150 gr SP #3031 this load I'm using is 1 grain under at 37, min was 38 in the book for this round minus the brass weight

[kcstott]

the bullets are 150 gr SP #3031 this load I'm using is 1 grain under at 37, min was 38 in the book for this round minus the brass weight

While what J-cat posted is true, there is still no reason to go below minimum ever. your faster burning powder will help you get more velocity in that short barrel.

I work the opposite way when I'm working up loads. but you need about a decade of reloading experience before you try what I'm doing. Basics of reloading can be taught but the vast majority needs to be experienced over time.

[J-cat]

While what J-cat posted is true, there is still no reason to go below minimum ever. your faster burning powder will help you get more velocity in that short barrel.

I work the opposite way when I'm working up loads. but you need about a decade of reloading experience before you try what I'm doing. Basics of reloading can be taught but the vast majority needs to be experienced over time.

[smoothy8500]

While what J-cat posted is true, there is still no reason to go below minimum ever.

There is a phenomenon that may occur in an undercharged case using a faster-burning powder. Instead of burning uniformly, the powder has a large surface area causing an extremely rapid flame front. This results in a pressure spike.

The conventional wisdom of dropping 1 or 1-1/2 gr with heavy brass applies (1) When using a "common or known load" such as the classic 308 load of 41.5gr IMR4895 with a 168 OTM. (2) Changing any component from your last known load, such as powder, primer, projectile.

[jessdigs]

I use IMR 4895, Varget, and CFE223 mostly. Sometimes 4198 and 4895 for cast, Lyman manual has data for these two powders.

Sent from my Pixel XL using Tapatalk

[J-cat]

There is a phenomenon that may occur in an undercharged case using a faster-burning powder. Instead of burning uniformly, the powder has a large surface area causing an extremely rapid flame front. This results in a pressure spike.

The conventional wisdom of dropping 1 or 1-1/2 gr with heavy brass applies (1) When using a "common or known load" such as the classic 308 load of 41.5gr IMR4895 with a 168 OTM. (2) Changing any component from your last known load, such as powder, primer, projectile.

The phenomenon you describe occurrs when you have less than 50% load density which is not the case with 37grs of 2015 in any 308 case.

Do you understand the effect of decreased case volume on pressure?