RL-25 & .300RUM

[Powerstroke]

Load data on RL-25 for the .300RUM with 180gr A.B.'s ?
I used 87grns yesterday, and it shot very well......but.....the
more research I do on it, the 87grns appears to be on the
"very light" side??
Thanks again

 

[FOTIS]

I used 92 gr for the 200 AccuBond soooooooooo........

you can sub that load with a 180 gr and work up.

Quickload says:


-------------------------------------------------------------------------------
WARNING: 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.3.1 Interior Ballistics V.3.1 #530153
© Copyright 1987-2004 - H.Broemel, Babenhausen, Germany
-------------------------------------------------------------------------------
Case capacity and propellant properties may vary considerably from lot to lot!

**** Input data: Date: 9-Oct-2006 Time: 12:54:11
Cartridge................. = .300 Rem Ultra Mag
Projectile type........... = .308, 180, NOS AccuBond 54825 with boattail

Max.avg.pressure(Piezo CIP)= 64977 psi Shot start / init pressure = 3626 psi
Projectile weight (gr)= 180 Groove caliber (in)= 0.308
Length of cartridge (in)= 3.598 Length of case (in)= 2.850
Case capacity(Grains Water)= 113.00 Length of projectile (in)= 1.382
Length of barrel (in)= 26.000
**** Values calculated:
Seating depth (in)= 0.634 Volume displaced (gn H2O)= 11.65
Comb.chamber volume(gn H2O)= 101.35 Projectile travel (in)= 23.784
**** Input data:
Propellant type........... = Alliant Reloder-25
Charge weight..........(gr)= 93.5 Load density......(g/cu.cm)= 0.921
Heat of Explosion (cal/lb)= 412777 Ratio of spec. heats cp/cv = 1.229
Solid density (gr/cu.in)= 409.7 Weighting factor...........= 0.5
Burning rate factor Ba(1/s)= 0.384 Pro-/degressivity factor a = 1.250
Burning limit ......... z1 = 0.7 Combust.Chamber Vb(ft³)= 2.323668E-4
Factor.................. b = 2.276 X-S.Area of Bore A(ft²)= 5.104334E-4
Bulk density (gr/cu.in)= 231.4 Projectile mass mp (lb)= 2.571429E-2
Loading ratio (%)= 100.6 Projectile travel x(ft)= 1.981988E+0

**** Results calculated:
Maximum pressure ........ = 64837 psi Way of projectile at Pmax = 3.53 in
Muzzle velocity ......Ve = 3271 fps Muzzle pressure .......Pe = 13215 psi
Project. energy at muzzle = 4276 ft.lbs Fraction of powder burnt = 100 %
Projectile travel time from 10% Pmax to muzzle = 1.2 ms

WARNING: Near Maximum Average Pressure - tolerances can cause dangerous pressures !
Real maximum of pressure inside barrel.
End of combustion before the projectile passes muzzle.

 

[Powerstroke]

Pop...
You ROCK ! Thanks for the info......Appears I can go ahead and lay the powder to it !
I actually had a response from Alliant as well.
Thanks again

 

[FOTIS]

Were they close to quickloads predicted max?

 

[R Flowers]

I chronographed a friend's 300 RUM for him and he is getting great speeds and groups using RL 25 and the 180 AccuBond.

He was loading 95 grains of RL 25 behind the 180 AccuBond and using CCI 250 primers in Remington cases. I shot groups under an inch and the chronograph said they were going 3360 fps.

His rifle is a Remington 700 SPS with a 26 inch barrel. Factory Remington 180 bonded core-lockt loads read 3249 fps.

 

[Powerstroke]

POP,
I'll have to look tomorrow......left info at work, but I'll let you know.

R Flowers
Thanks for the info.....Mines a 700 Sendero and using Federal 215's
The RL-25 shot awesome yesterday.....hope raising the grains doesn't sacrifice accuracy, but we'll see.
Mule Deer hunt planned for two weekends from now......draw area, and only 6 tags given that season. Hoping to find a monster.

 

[FOTIS]

OK let me know

 

[yeayow]

quickload is predicting about 3320 fps and a pressure of 68500 psi with 95 grains of RL25. I'd be careful with that load.

 

[FOTIS]

Yup...that is why I only input 93.5 gr as max (under 65K psi).

Of course every gun is different and yada, yada, yada........

 

[Powerstroke]

POP,
What I received was basically a copy of most the reloading manuals.
Barnes obviously shows the lowest charge with a max of 89grns Flat Base.
Hornaday on the large end of the scale with a max of 95.3grns. Swift showing 93.5grns for max.......I know I've seen 97grns somewhere as a "max".......As well as it's shooting right now, I doubt I'll vary a whole lot.
This was my first time with the RL-25, I may see how well the 200grn A.B.s like that powder......so far, I haven't been able to find a powder for the 200's.
What is this " quickload " Software you have?
Thanks

 

[FOTIS]

http://www.neconos.com/details3.htm

this is the software.
With the 200 AB 92 gr of rl 25 and 95 gr of retumbo have been max in my SAKO 75.

Yup, according to your manual fron Alliant quickload is pretty darn close.

 

[Powerstroke]

POP
Thanks once again. My Dad has bull tag for this weekend. I'm hoping I can get him to use the .300. If not, I have a deer tag for our second season.