Quickload prediction request
- Thread starter Tumbleweed
- Start date
I've never bothered with those fang-dangled magic theory charts you mention, but I have some real world experience with your combination.
I have loaded and chronographed, 200 grain Nosler and 200 grain pointed Speer, which react identical, with IMR4350, in two different 30-06 rifles.
The rifles each had 24 inch barrels, but one always got 75 to 90 fps faster with the same loads. Also, the one with higher velocity was quicker to show excess pressure.
You shouldn't run into pressure problems with 55.5 grains of 4350.
I used 56 grains in the rifle that showed the greater velocity, and that gave me 2630 fps.
In the other rifle I went to 57 grains and that gave me about 2660.
None of this gave any indication of excess pressure in either rifle. Bolt opened with the same ease as it does on a loaded cartridge.
I have loaded and chronographed, 200 grain Nosler and 200 grain pointed Speer, which react identical, with IMR4350, in two different 30-06 rifles.
The rifles each had 24 inch barrels, but one always got 75 to 90 fps faster with the same loads. Also, the one with higher velocity was quicker to show excess pressure.
You shouldn't run into pressure problems with 55.5 grains of 4350.
I used 56 grains in the rifle that showed the greater velocity, and that gave me 2630 fps.
In the other rifle I went to 57 grains and that gave me about 2660.
None of this gave any indication of excess pressure in either rifle. Bolt opened with the same ease as it does on a loaded cartridge.
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I have no real world experience with H4350 and the Nosler 200 Partition. I have shot that big Partition a fair bit, but my powder of choice has been Norma MRP. At 58 - 59 grains, depending on the rifle, That delivers 2700 and pennies, and in every rifle I used it in, shot very well, indeed. Here's a typical target. Eagleye.
-------------------------------------------------------------------------------
WARNIN
Table produced by not verified Ballistics Calculations! Check results
always against loading data of current reloading manuals! Input data and results
may be invalid or wrong! The use of this data for loading ammunition can cause,
directly or indirectly, serious injury to personnel and material. No responsibi-
lity is implied and THE USER MUST ASSUME THE ENTIRE RISK OF USING THE DATA.
QuickLOAD© V.3.2 Interior Ballistics V.3.2 #230031
© Copyright 1987-2006 - H.Broemel, Babenhausen, Germany
-------------------------------------------------------------------------------
Case capacity and propellant properties may vary considerably from lot to lot!
**** Input data: Date: 21-Mar-2011 Time: 06:19:32
Cartridge................. = .30-06 Spring.
Projectile type........... = .308, 150, Speer SP 2023 with flatbase
Max.avg.pressure(Piezo CIP)= 58740 psi Shot start / init pressure = 1600 psi
Projectile weight (gr)= 150 Groove caliber (in)= 0.308
Length of cartridge (in)= 3.300 Length of case (in)= 2.494
Case capacity(Grains Water)= 68.20 Length of projectile (in)= 0.960
Length of barrel (in)= 23.000
**** Values calculated:
Seating depth (in)= 0.154 Volume displaced (gn H2O)= 2.90
Comb.chamber volume(gn H2O)= 65.30 Projectile travel (in)= 20.660
**** Input data:
Propellant type........... = Hodgdon H4350
Charge weight..........(gr)= 55.5 Load density......(g/cu.cm)= 0.848
Heat of Explosion (cal/lb)= 432279 Ratio of spec. heats cp/cv = 1.232
Solid density (gr/cu.in)= 394.5 Weighting factor...........= 0.6
Burning rate factor Ba(1/s)= 0.475 Pro-/degressivity factor a = 0.530
Burning limit ......... z1 = 0.6 Combust.Chamber Vb(ft³)= 1.497113E-4
Factor.................. b = 1.694 X-S.Area of Bore A(ft²)= 5.115178E-4
Bulk density (gr/cu.in)= 231.4 Projectile mass mp (lb)= 2.142857E-2
Loading ratio (%)= 92.7 Projectile travel x(ft)= 1.721654E+0
**** Results calculated:
Maximum pressure ........ = 37034 psi Way of projectile at Pmax = 2.12 in
Muzzle velocity ......Ve = 2659 fps Muzzle pressure .......Pe = 9714 psi
Project. energy at muzzle = 2355 ft.lbs Fraction of powder burnt = 91.9 %
Projectile travel time from 10% Pmax to muzzle = 1.27 ms
WARNIN
Table produced by not verified Ballistics Calculations! Check resultsalways against loading data of current reloading manuals! Input data and results
may be invalid or wrong! The use of this data for loading ammunition can cause,
directly or indirectly, serious injury to personnel and material. No responsibi-
lity is implied and THE USER MUST ASSUME THE ENTIRE RISK OF USING THE DATA.
QuickLOAD© V.3.2 Interior Ballistics V.3.2 #230031
© Copyright 1987-2006 - H.Broemel, Babenhausen, Germany
-------------------------------------------------------------------------------
Case capacity and propellant properties may vary considerably from lot to lot!
**** Input data: Date: 21-Mar-2011 Time: 06:19:32
Cartridge................. = .30-06 Spring.
Projectile type........... = .308, 150, Speer SP 2023 with flatbase
Max.avg.pressure(Piezo CIP)= 58740 psi Shot start / init pressure = 1600 psi
Projectile weight (gr)= 150 Groove caliber (in)= 0.308
Length of cartridge (in)= 3.300 Length of case (in)= 2.494
Case capacity(Grains Water)= 68.20 Length of projectile (in)= 0.960
Length of barrel (in)= 23.000
**** Values calculated:
Seating depth (in)= 0.154 Volume displaced (gn H2O)= 2.90
Comb.chamber volume(gn H2O)= 65.30 Projectile travel (in)= 20.660
**** Input data:
Propellant type........... = Hodgdon H4350
Charge weight..........(gr)= 55.5 Load density......(g/cu.cm)= 0.848
Heat of Explosion (cal/lb)= 432279 Ratio of spec. heats cp/cv = 1.232
Solid density (gr/cu.in)= 394.5 Weighting factor...........= 0.6
Burning rate factor Ba(1/s)= 0.475 Pro-/degressivity factor a = 0.530
Burning limit ......... z1 = 0.6 Combust.Chamber Vb(ft³)= 1.497113E-4
Factor.................. b = 1.694 X-S.Area of Bore A(ft²)= 5.115178E-4
Bulk density (gr/cu.in)= 231.4 Projectile mass mp (lb)= 2.142857E-2
Loading ratio (%)= 92.7 Projectile travel x(ft)= 1.721654E+0
**** Results calculated:
Maximum pressure ........ = 37034 psi Way of projectile at Pmax = 2.12 in
Muzzle velocity ......Ve = 2659 fps Muzzle pressure .......Pe = 9714 psi
Project. energy at muzzle = 2355 ft.lbs Fraction of powder burnt = 91.9 %
Projectile travel time from 10% Pmax to muzzle = 1.27 ms
Quickload doesn't give the excess pressure warning messages, and the velocity is the the ballpark of what H4831 said.
58.5 grains is bad at 44059psi, according to the program.
It seems that g+colon gives you a grenade, Jungian acausal parallelism at work.
58.5 grains is bad at 44059psi, according to the program.
It seems that g+colon gives you a grenade, Jungian acausal parallelism at work.
Thanks!
I was curious as to what pressures might await me there; I'm working my way up through 54 gr., and the groups are shrinking as I go up.
I routinely use 55.5 gr of IMR 4350 with 180 Nosler Partitions (my standard load for many years), but I haven't done much with 200 gr. so that's where I'm exploring lately. Just trying to keep my mind occupied until all this damn snow goes, so I ordered another HVA from Trade-Ex and started all over again.
I ran a ladder with RL-22; I got down to 1.3" at 57 gr., but then groups started to open up again.
I was curious as to what pressures might await me there; I'm working my way up through 54 gr., and the groups are shrinking as I go up.
I routinely use 55.5 gr of IMR 4350 with 180 Nosler Partitions (my standard load for many years), but I haven't done much with 200 gr. so that's where I'm exploring lately. Just trying to keep my mind occupied until all this damn snow goes, so I ordered another HVA from Trade-Ex and started all over again.
I ran a ladder with RL-22; I got down to 1.3" at 57 gr., but then groups started to open up again.
Thanks, Eagleye...I'll have to try to get my hands on some MRP - it seems to be pretty scarce.
I've been told that RL-22 is supposed to be the same, but I've never had any MRP to try side-by-side to confirm that.
I had to use more powder to get your velocity, Eagleye.
Old Norma loading charts show a maximum load of 60.5 grains of Norma 205 with a 200 grain bullet, for a velocity of about 2690. I duplicated that load and got 2673. No sign, whatsoever, of excess pressure, so went to 61 grains and got 2715 fps, still with normal pressure.
Considerable more powder than you used, but the rifle I tested always showed less velocity, with any load, when compared to another 30-06 I had.
Old Norma loading charts show a maximum load of 60.5 grains of Norma 205 with a 200 grain bullet, for a velocity of about 2690. I duplicated that load and got 2673. No sign, whatsoever, of excess pressure, so went to 61 grains and got 2715 fps, still with normal pressure.
Considerable more powder than you used, but the rifle I tested always showed less velocity, with any load, when compared to another 30-06 I had.
Yes, H4831, I have had some rifles that took more powder to get the "magic" 2700+ with the 200. Like yourself, I have often used the Speer 200 for working up the load, then switched to the Partition for the final tune. Old Norma 205 [Same powder as MRP, basically] was accused of lot-to-lot variations, so a slow lot would give lower velocities for sure.
I had a M17 30-06 that took 64 grains of one lot of old N205 to reach 2700 with the 180 in it. No pressure signs at all. But in all fairness, that barrel slugged pretty generous, as well. Regards, Eagleye.
