6.5 prc

[sako2]

Quickload for 6.5 prc. Could someone run a hornady 140gn eld-m with rl26 , 24" barrel,hornady brass, c.o.l of 2.950 thru quickload. Thank's very much.

 

[TackDriver284]

Cartridge          : 6.5 PRC
Bullet             : .264, 140, Hornady ELD-M 26331
Useable Case Capaci: 62.289 grain H2O = 4.044 cm³
Cartridge O.A.L. L6: 2.950 inch = 74.93 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant Reloder-26 *C

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-10.0   87    53.82   2802    2441   45638  12583    100.0    1.396
-09.0   88    54.42   2833    2496   47322  12648    100.0    1.373
-08.0   89    55.02   2864    2550   49061  12711    100.0    1.350
-07.0   90    55.61   2895    2605   50858  12773    100.0    1.328
-06.0   91    56.21   2926    2661   52719  12835    100.0    1.306
-05.0   92    56.81   2956    2716   54647  12895    100.0    1.285
-04.0   93    57.41   2986    2772   56645  12954    100.0    1.264  ! Near Maximum !
-03.0   94    58.01   3016    2829   58716  13013    100.0    1.244  ! Near Maximum !
-02.0   95    58.60   3046    2885   60862  13070    100.0    1.224  ! Near Maximum !
-01.0   96    59.20   3076    2942   63087  13126    100.0    1.204  ! Near Maximum !
+00.0   97    59.80   3106    2999   65394  13181    100.0    1.185  !DANGEROUS LOAD-DO NOT USE!
+01.0   98    60.40   3136    3056   67787  13234    100.0    1.166  !DANGEROUS LOAD-DO NOT USE!
+02.0   99    61.00   3165    3114   70270  13287    100.0    1.147  !DANGEROUS LOAD-DO NOT USE!
+03.0  100    61.59   3195    3172   72846  13338    100.0    1.129  !DANGEROUS LOAD-DO NOT USE!
+04.0  101    62.19   3224    3231   75521  13388    100.0    1.111  !DANGEROUS LOAD-DO NOT USE!
+05.0  102    62.79   3253    3290   78298  13437    100.0    1.094  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba     97    59.80   3222    3227   81005  12696    100.0    1.088  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     97    59.80   2927    2662   50311  13823     99.6    1.318

 

[sako2]

Thanks Tackdrivers. I thought i could go higher on the powder charge because my velocity is at 2950. And i don't see any pressure signs.

 

[Blkram]

At only the 45000 psi range the pressure seems low...perhaps redoing with pressure in the 60-65K range would show better velocity than 2800 fps?

 

[frankm]

2935 was what my friends 6.5 PRC was running with 143 X Hornady Superformance. I d say you can do that with R26 but you re “there” pressure wise; signs or no signs.

Should be an excellent performer if it has the accuracy you desire.

 

[sako2]

Chronoed 56.8gns average velocity was 2879. Es was 8 and sd was 3. Pretty slow. 57.5gns with a 140gn eld-m averaged 2933. Es 27 sd 12.

 

[TackDriver284]

You should get mid 3,000 fps with it, my 6.5 x 284 ( not a 6.5 PRC ) with the H4831SC was slow with the 143 ELD X when I last tested it, it was not accurate as I wanted it, it was running at book max ( 49 grains ) at mid 2700 fps. So I ran a ladder and carefully up to 4 grains past book max. Found a node at 2890 fps and 52.3 grains, its 3.2 grains past max. There was pressure around 53 grains with slight ejector mark and little stiff bolt and I backed off. Same issue with my 7mm and 300 Mags.
Not asking you to increase your charges, if you are happy with your speed and accuracy, stick with it. . The 6.5 PRC is slightly faster than the 6.5 x 284 by about 100 to 150 fps depending on powder choice. I was using H4831sc which is way slower than RL 26.
RL26 is the bees knees when it comes to velocity.

 

[TackDriver284]

Chronoed 56.8gns average velocity was 2879. Es was 8 and sd was 3. Pretty slow. 57.5gns with a 140gn eld-m averaged 2933. Es 27 sd 12.

I could run Quickload for you to get the current pressure when you tested it, just give me your H20 case fill, powder charge, speed, barrel length, COAL and bullet details.

 

[sako2]

64.6 of H2o, 56.8gns rl26, c.o.l 2.950, 24" barrel, 2879 velocity, 143gn eld-x

 

[Ridge_Runner]

hornady precision hunter 143 eldx factory loads chrony's 2962 fps from my buddy's bergara

 

[TackDriver284]

64.6 of H2o, 56.8gns rl26, c.o.l 2.950, 24" barrel, 2879 velocity, 143gn eld-x

I ran the numbers, it seems you are under pressure with 56.8 grains. First picture is your current load, 2nd pic is a mid range load at 3000 fps with 59 grains of RL 26 and the 3rd pic is a max load with 60.5 grains of RL 26. Please do not duplicate the loads, work your way up using a ladder under a chrono. Hope this helps to show you your current pressure. Case fill may be an issue if going higher on powder charges, it's over 100%. Possibly try with a drop tube.

 

[sako2]

Thanks Tackdriver. I'll slowly work up.

 

[TackDriver284]

Thanks Tackdriver. I'll slowly work up.

Let us know the results.

 

[sako2]

Will do.

 

[sako2]

Loaded 10 rounds at 57.5 gn rl26 and c.o.l. at 2.335 with the hornady overall lenght gauge. Got a average of 2951 ES 15 and SD 6 shot really well. I'm good with that. Thanks for the help