Anyone Hand Loading 300Rum

[astepanuk]

Hey guys


I'm running 230GR Berger Hybrid this year I was planning on using Retumbo but cant seem to locate any so i decided to swtich to H1000 just wondering if anyone has tried it.

Thanks

[elkhunter11]

I have never loaded bullets that heavy for the 300RUM, but both of my rifles liked R-25 with 180gr bullets.

[buckbrushoutdoors]

sorry to hijack but has anyone used the 110gr or 130gr ttsx in the 300ultra?

[astepanuk]

110-130 is pretty light for 300 RUM

[damienelliott]

I used a 125 nosler ballistic tip in 300 rum shot a few coyotes with them they didnt ever open up just pencil right through pretty hard on the barrel though

[DaleJ]

I used a 125 nosler ballistic tip in 300 rum shot a few coyotes with them they didnt ever open up just pencil right through pretty hard on the barrel though

Curious, why would one bullet would be hard on the barrel and another not?

[wolf308]

I have never loaded bullets that heavy for the 300RUM, but both of my rifles liked R-25 with 180gr bullets.

me too. just the one rifle though for me

[sillyak]

Curious, why would one bullet would be hard on the barrel and another not?

Barrel life is dependent on: bore size, powder weight, energy density of powder and round pressurre. So given equal pressure and a powder with the same energy density, a lighter projectile will use more powder and have less barrel life. This is pretty minimal though.

IMO the point of large capacity in 7mm + bore sizes in to shoot the heavies at good velocity.

[damienelliott]

Sillyak has your answer its the increased pressure of the extra powder it would usually be the throat of the rifle rather than rifling burning out . Those rums are called an overbore cartridge and dont utilize all the powder thats in them.

[blackmamba]

I'm running H4831sc at 92.5 gr with 165 sciroccos and my gun loves this set up .. I also had imr 7828 with almost the same grouping.. I'm gonna try H1000 here right away and see how the grouping is..

[elkhunter11]

Barrel life is dependent on: bore size, powder weight, energy density of powder and round pressurre. So given equal pressure and a powder with the same energy density, a lighter projectile will use more powder and have less barrel life. This is pretty minimal though.

But to expand on that theory, the heavier bullet is in the barrel longer after the powder begins to burn , which exposes the barrel to the pressure and temperature, for a longer period of time.

[DaleJ]

Sillyak has your answer its the increased pressure of the extra powder it would usually be the throat of the rifle rather than rifling burning out . Those rums are called an overbore cartridge and dont utilize all the powder thats in them.

Barrel throat erosion is heat generated. The 125 gr at 60,000 psi is in the barrel for a much shorter time then a 200 gr bullet. A 200 gr bullet in the same cartridge pressure range will generate the same pressure and heat over an increased time span. The heat generated by the gasses created would quickly melt down any barrel steel if applied for even a second or two. But I am not an expert.

[Northern Canuck]

I have done a bit of reloading for the 300 RUM. I have worked up loads for the 210 VLD Berger and the 180 and 200 gr triple shocks. The Retumbo works very well and also R25. My 210s are too long to put in the floor plate so I feed them 1 at a time. I use these for long range shooting (700 m). I am away working right now so I do not have the load data handy. I have found the the TSXs love speed.:fighting0074:

[damienelliott]

Barrel throat erosion is heat generated. The 125 gr at 60,000 psi is in the barrel for a much shorter time then a 200 gr bullet. A 200 gr bullet in the same cartridge pressure range will generate the same pressure and heat over an increased time span. The heat generated by the gasses created would quickly melt down any barrel steel if applied for even a second or two. But I am not an expert.

I am not an expert either. I would think the speed of the lighter bullet has a big factor

[bubba300]

I have tried rl25,rl22,h4831,imr4350,h1000 & retumbo in mine,all worked reasonably well but got best groups with retumbo with 200 gr accubonds and the h1000 was 2nd best.I would like to try some h50bmg and see how that works.Anyone tried h50 in a 300 rum.

[elkhunter11]

I am not an expert either. I would think the speed of the lighter bullet has a big factor

If barrels wore out due to friction it might be, but the throat burns out from heat and pressure, long before that happens.

[DaleJ]

Barrel erosion occurs where bullets are travelling at their lowest velocity. I don't think velocity is a factor. Never see barrels erode at the muzzle where velocity is highest.

[damienelliott]

All that makes sense thanks for the info but back to the thread I had great luck with imr 4350 behind a 180 tsx can't remember the grains now

[DaleJ]

Hey guys


I'm running 230GR Berger Hybrid this year I was planning on using Retumbo but cant seem to locate any so i decided to swtich to H1000 just wondering if anyone has tried it.

Thanks

You should be able to find a good load with H1000. Used 88 gr H1000 with a 235 gr bullet and F215 primers in a 300 RUM.

[elkhunter11]

I do have some Retumbo on hand, as well as some R-25 in Fort Mcmurray, but in both cases likely only a pound or less of each. I can likely help you out to do some testing, but you would still need to find a supply, once the testing is complete.

[astepanuk]

THanks ElkHunter i have enough retumbo to run a ladder test I think Ill run the H1000 I'm confident ill get a load developed.

DaleJ I was thinking of starting at 84.0Gr ill load 5 rounds .5 Gr diffrence upto 89 GR. Ill find something in there my rifle likes to shoot.

Thanks i'm still pumped to load these 230GR Berger Hybrids.

[LongBomber]

I ran a ladder test with retumbo from 86-92gr and the 230gr. CCI mag primer, rem case. I found 91gr and 92 gr to hit the top of the group, 86-90gr climbed back and forth in the middle. No pressure signs based on case head expansion, still around 3-4thou expansion at 92gr and the primers weren't flattened. I don't have a chrono at the momment so no velocities.

Three shots of the 91 gr load went under an inch (just) at 300 yards fired prone from a bipod. It was the best shooting conditions I have had in a while, not even a fart of a breeze. I can't wait to stretch them out further.

[peakseeker]

I have tried rl25,rl22,h4831,imr4350,h1000 & retumbo in mine,all worked reasonably well but got best groups with retumbo with 200 gr accubonds and the h1000 was 2nd best.I would like to try some h50bmg and see how that works.Anyone tried h50 in a 300 rum.

I have tried h50bmg in my rum. I couldn't get the velocity or accuracy that I could with retumbo.

[peakseeker]

Retumbo and 200 accubonds are my go to load as well. They hit like a freight train and so far they shoot moa and under out to 300yds. Still testing.

[saintsix]

I just picked up a 300rum as well, next weekend I should be able to get out to test some loads ill be testing 200gr accubonds and the 185 berger vld hunting with H100, ill let ya know how I do if your interested. keep us posted on your results im interested :)