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Wasn't going to do it this close to the hunting season but got restless.
Had a okay load with H1000 and Berger 230 gr target hybrid. Used 88.5 gr for vel of 2860 fps. Load is close to max.
The barrel was a 24" rem takeoff in 300 win mag. I machined it to fit a push feed model 70 and used a PTG reamer.
Used the same components with same seating depth just substituted RL-33. Started with 90 gr and worked up. Temperatures were 85-90 degrees. Here are the results so far:
90gr 2665 92gr 2745 94gr no reading cardboard shades moved had to wait for next ceasefire to adjust 96gr 2875 98 gr 2925 100gr 3001
No signs of pressure, no bolt lift issues, primers look good etc. Will start when range opens and temps are in the low 50s. Will chrono the 100 gr load again for comparison.
------- I went out again today to continue the 300 RUM testing with RL-33 and the 230 Berger target hybrid:
Shot the 100 gr load this morning in 60-70 degree weather. The average velocity for four shots was 2975 fps. This compares pretty close to yesterday's two shots averaging 3001 at 85-90 degrees. Will need more rounds to conclude if the powder is temp sensitive as well as cooler mornings. Az just won't cooperate with cooler weather yet.
Continued with more powder:
101 grs 2983 fps This is the first increase that didn't show a 50-70 fps increase in velocity. It would appear that there is nothing more to gain by increasing charges
102 grs 3016 had a tiny amount of bolt lift resistance. Didn't try any hotter loads.
For my rifle 100 gr is the max I'll shoot. It was the most accurate too.
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What kind of accuracy?
Roy
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Interesting, wonder what it would do for 180's compared to Retumbo....prob shows more benefit with the heavies
100% Public land DIY!
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Az, What time were you at the range? I was at pima around 1100.
Enrique O. Ramirez CLAN OF THE BORDER RATS - Member
"..faith is being sure of what you hope for and certain of what you do not see.." Hebrews 11:1
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Accuracy? If I did my part the bulletholes would kiss each other. Going out sometime during the week for final sightin.
I have no idea if RL-33 will help with a 180. Most likely run out of powder space first. Only way to know it to try it. Doubt you'll get to signs of pressure.
Enrique..I opened up the place and usually leave by 9 or sometimes 10am. We just missed each other.
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FWIW...The new quickload has re33 in the library. Looks like it's got the speed pretty close but pressure looks a bit scary. I know the rum seems to get run pretty hard before pressure shows. This is just something to look at: Cartridge : .300 Rem Ultra Mag
Bullet : .308, 240, Sierra MK
Cartridge O.A.L. L6: 3.598 inch or 91.39 mm
Barrel Length : 24.0 inch or 609.6 mm
Powder : Alliant Reloder 33
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 86.40 2553 3329 46551 14266 98.0 1.557
-09.0 88 87.36 2584 3410 48271 14406 98.3 1.530
-08.0 89 88.32 2615 3492 50054 14538 98.7 1.504
-07.0 90 89.28 2646 3575 51903 14661 99.0 1.479
-06.0 91 90.24 2676 3658 53820 14775 99.2 1.454
-05.0 92 91.20 2707 3743 55808 14881 99.5 1.429 ! Near Maximum !
-04.0 93 92.16 2738 3827 57870 14977 99.7 1.405 ! Near Maximum !
-03.0 94 93.12 2768 3913 60009 15064 99.8 1.382 ! Near Maximum !
-02.0 95 94.08 2798 3999 62228 15141 99.9 1.358 ! Near Maximum !
-01.0 96 95.04 2829 4086 64532 15208 100.0 1.336 !DANGEROUS LOAD-DO NOT USE!
+00.0 97 96.00 2859 4173 66924 15265 100.0 1.314 !DANGEROUS LOAD-DO NOT USE!
+01.0 98 96.96 2888 4261 69408 15316 100.0 1.292 !DANGEROUS LOAD-DO NOT USE!
+02.0 99 97.92 2918 4349 71988 15366 100.0 1.270 !DANGEROUS LOAD-DO NOT USE!
+03.0 100 98.88 2948 4438 74668 15413 100.0 1.249 !DANGEROUS LOAD-DO NOT USE!
+04.0 101 99.84 2977 4527 77454 15460 100.0 1.229 !DANGEROUS LOAD-DO NOT USE!
+05.0 102 100.80 3007 4616 80352 15505 100.0 1.208 !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 96.00 2987 4557 82212 14660 100.0 1.202 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 97 96.00 2666 3630 52029 15373 96.6 1.465
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forgot to mention ql doesn't have the 230 bullet in the library...I used a 240mk but changed the wt to 230 for the calc.
Also.... a long throat in the barrel could easily relieve pressure by 8k or more. Not sure how you have it set up.
Last edited by kraky111; 10/20/12.
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Thanks for looking up RL-33 in quickload Kraky,
There are some differences between the 230 hybrid and the 240 sierra. I have both and the hybrid has alot less bearing surface. I am happy with the results I am getting and will run with it. There is a jump to the rifling as I am loading so it fits the wyatt's mag box. Never bothered to measure the jump though. Why bother when the hybrid will shoot pretty much anywhere you seat it.
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Campfire Ranger
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FWIW...The new quickload has re33 in the library. Looks like it's got the speed pretty close but pressure looks a bit scary. I know the rum seems to get run pretty hard before pressure shows. This is just something to look at: Cartridge : .300 Rem Ultra Mag
Bullet : .308, 240, Sierra MK
Cartridge O.A.L. L6: 3.598 inch or 91.39 mm
Barrel Length : 24.0 inch or 609.6 mm
Powder : Alliant Reloder 33
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 86.40 2553 3329 46551 14266 98.0 1.557
-09.0 88 87.36 2584 3410 48271 14406 98.3 1.530
-08.0 89 88.32 2615 3492 50054 14538 98.7 1.504
-07.0 90 89.28 2646 3575 51903 14661 99.0 1.479
-06.0 91 90.24 2676 3658 53820 14775 99.2 1.454
-05.0 92 91.20 2707 3743 55808 14881 99.5 1.429 ! Near Maximum !
-04.0 93 92.16 2738 3827 57870 14977 99.7 1.405 ! Near Maximum !
-03.0 94 93.12 2768 3913 60009 15064 99.8 1.382 ! Near Maximum !
-02.0 95 94.08 2798 3999 62228 15141 99.9 1.358 ! Near Maximum !
-01.0 96 95.04 2829 4086 64532 15208 100.0 1.336 !DANGEROUS LOAD-DO NOT USE!
+00.0 97 96.00 2859 4173 66924 15265 100.0 1.314 !DANGEROUS LOAD-DO NOT USE!
+01.0 98 96.96 2888 4261 69408 15316 100.0 1.292 !DANGEROUS LOAD-DO NOT USE!
+02.0 99 97.92 2918 4349 71988 15366 100.0 1.270 !DANGEROUS LOAD-DO NOT USE!
+03.0 100 98.88 2948 4438 74668 15413 100.0 1.249 !DANGEROUS LOAD-DO NOT USE!
+04.0 101 99.84 2977 4527 77454 15460 100.0 1.229 !DANGEROUS LOAD-DO NOT USE!
+05.0 102 100.80 3007 4616 80352 15505 100.0 1.208 !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 96.00 2987 4557 82212 14660 100.0 1.202 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 97 96.00 2666 3630 52029 15373 96.6 1.465
Quick load does not work very well with the 300 Remington ultra mag. I know this cuz my numbers are always off. It does not take into account the freebore.
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You have to change the Ba rate.. Once you get a couple shots over it you can zero it in.
Semper Fi
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Scotty. I can tell you that 97 grains gave me 3230 fps with the 199 hammers.
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Now that is what I am talking about! There aint no elk on the mountain taking that sorta HP!
Did you have an 8 twist for that load?
Semper Fi
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Final load
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That looks good Fotis. Can’t wait to try it in the new rifle.
What twist is the barrel?
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Got it. Excellent. I have a 1-8 on order for a Defiance. Looking forward to 4" of magazine to work with. The RUM is an animal, but mag space is at a premium. Hoping this will be a good one.
Semper Fi
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