You have a large amount of freebore to begin with. Go shoot some.
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Trying to work on a load for a browning abolt 300 rum? Questions! Lots!
- Thread starter huntxtrm
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barefooter56
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huntxtrm,
The bullet is to deep in the case sir. You will not be able to seat these to the standard 3.600 COL due to the length of the bullet. Since these are a HYBRID they are very tolerant of jump. It sounds like you have the right idea with starting with the lowest powder charge listed . What we suggest is that you start .015 off the lands and work back in .015 increments at this charge weight to find your seating depth sweet spot. Then work your load up in 1/2 grain increments until you get 2 grains BELOW MAXIMUM then drop to 1/10th grain increments. All the while you will be checking for pressure signs and accuracy. If being able to load magazine length rounds go to our 185 grain CLASSIC HUNTER. These are also a HYBRID design and are made to work at magazine length seating depths. The 215 HYBRIDS will be single load only. Please let us know if you have any more questions. You can contact us either by posting again in this string or [email protected]
Take care!
Phil Hoham
Berger Bullet Tech
The bullet is to deep in the case sir. You will not be able to seat these to the standard 3.600 COL due to the length of the bullet. Since these are a HYBRID they are very tolerant of jump. It sounds like you have the right idea with starting with the lowest powder charge listed . What we suggest is that you start .015 off the lands and work back in .015 increments at this charge weight to find your seating depth sweet spot. Then work your load up in 1/2 grain increments until you get 2 grains BELOW MAXIMUM then drop to 1/10th grain increments. All the while you will be checking for pressure signs and accuracy. If being able to load magazine length rounds go to our 185 grain CLASSIC HUNTER. These are also a HYBRID design and are made to work at magazine length seating depths. The 215 HYBRIDS will be single load only. Please let us know if you have any more questions. You can contact us either by posting again in this string or [email protected]
Take care!
Phil Hoham
Berger Bullet Tech
huntxtrm
Well-Known Member
On the info that I went off of, it says COL 3.600. The info supposedly came from Berger, for the 300 Rum and 215 hybrid with Retumbo..? It was posted by another on this forum. So, with what your saying, don't always look at the COL listed for the load? I'm new, not sassin, just wondering why it would be put on the load data, if it shouldn't be used.
On the other end, is there a Max COL? Because when I go to the lands on the browning, the bullet is dang near falling out of the case. So, .015 off the lands, to start might be a stretch. LOL. When I put an empty with 215 in the end of it, and pushed it to the lands, it measured 4.092 COL.
You are giving me a good idea though, I think? should I load some to single shot, that are long range accurate with the 215 hybrids, and load some that will go in my mag, out of the 185 classic hunters, just to carry around hunting? Sounds like a good idea? I appreciate the guidance.
g0rd0
Well-Known Member
all good sound advice.
Now my 2 cents worth.
I deprime sepately then clean then neck size then trim every time
Once I feel resistance when chambering (about 5 loads), I deprime, aneal, full length size and trim.
I have never needed to crimp
As you work up a new load stick with the oal specs in your manual, once you have your sweet load then try 3 at oal +5 thou, 3 at +10 thou ect, ect till you reach the lands, see a loss of accuracy, or notice an unsafe preasure
And always keep clear records of all of your loads so that you can keep track of what you liked. Each rifle needs it's own book and set of dies
Now my 2 cents worth.
I deprime sepately then clean then neck size then trim every time
Once I feel resistance when chambering (about 5 loads), I deprime, aneal, full length size and trim.
I have never needed to crimp
As you work up a new load stick with the oal specs in your manual, once you have your sweet load then try 3 at oal +5 thou, 3 at +10 thou ect, ect till you reach the lands, see a loss of accuracy, or notice an unsafe preasure
And always keep clear records of all of your loads so that you can keep track of what you liked. Each rifle needs it's own book and set of dies
huntxtrm
Well-Known Member
Can I neck size with a full length die? or do I need a special die for neck sizing?
barefooter56
Well-Known Member
- Joined
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huntxtrm,
The 3.600 is the industry standard COAL for mag length cartridge. I will have to look into why we list it. It may be required by SAAMI I don't know. Our CLASSIC HUNTERS however are the only bullets we manufacture that are designed to be seated to magazine depth. The point of impact will be different for the 185s than the 215s. You can run some loads on the load program on our website to see if you can get that to work. If not you may want to stick with one or the other and not mix. The MAX COAL is the bullet touching the lands...(if you can get there) and is different for every rifle. May want to see how much bearing surface of the bullet is in the case neck and work back from there. If not enough go to .030 off and so on. Hybrids tolerance of jump is your saving grace. Plus seating depth sweet spots can repeat and different seating depths so you may find one a little deeper than the first to give yourself some room to set the bullet out as the throat erodes.
Take care!
Phil Hoham
Berger Bullet Tech
The 3.600 is the industry standard COAL for mag length cartridge. I will have to look into why we list it. It may be required by SAAMI I don't know. Our CLASSIC HUNTERS however are the only bullets we manufacture that are designed to be seated to magazine depth. The point of impact will be different for the 185s than the 215s. You can run some loads on the load program on our website to see if you can get that to work. If not you may want to stick with one or the other and not mix. The MAX COAL is the bullet touching the lands...(if you can get there) and is different for every rifle. May want to see how much bearing surface of the bullet is in the case neck and work back from there. If not enough go to .030 off and so on. Hybrids tolerance of jump is your saving grace. Plus seating depth sweet spots can repeat and different seating depths so you may find one a little deeper than the first to give yourself some room to set the bullet out as the throat erodes.
Take care!
Phil Hoham
Berger Bullet Tech
barefooter56
Well-Known Member
- Joined
- Nov 10, 2014
- Messages
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Only on NEW brass ! Don't do it with fired. The die body contacts the case body on fired brass and can push the shoulder up that decreases headspace and may cause the cartridge not to chamber. You can set up the die to give you a .002-.003 shoulder bump using the longest piece of fired brass that still chambers ( with a little friction is best). Get a bump gauge insert and body that fits your calipers ( Sinclair or Hornady) and a set of Redding Competiton shell holders. Set the FL die up touching a standard shell holder , Measure the cartridge and note the length. Insert the .010 thick Comp. shell holder in the press ram and run the case through the die. Check . If pushes shoulder back .002-.003 good ,no movement or gets longer go to the .008 thick shellholder. Repeat until you get to the .002-.003 bump desired. That's the easy way. Harder is adjusting the die in the threads of the press to get there but it can be done. Always check by cycling empty brass or dummy round through action.
Take care,
Phil Hoham
Berger Bullet Tech
Take care,
Phil Hoham
Berger Bullet Tech
huntxtrm
Well-Known Member
I have my cases trimmed to 2.840, the 215s are 1.590 by my caliber. My rifles are at 4.092. That only leaves .338 in the neck. Looks like about .235 of that is boat on the back. Should the flat be fully seated to the back of the neck, at the least? I'm just trying to arrive at a max length starting point for this rifle. Add .015 to that, that's only .118 of the flat in the case neck. Seems like not much to me. Its got good tension at that. I'm not the pro here. So what advice you give me, I will go with it.
barefooter56
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- Joined
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huntxtrm,
If it looks shaky seat the bullet a little deeper in increments. Don't be afraid to start with the boat tail of the bullet mid-way in the shoulder. The Hybrids do have a short bearing surface compared to the VLDs but that doesn't mean you can experiment a little. If you have/ want too.
Take care,
Phil Hoham
Berger Bullet Tech
If it looks shaky seat the bullet a little deeper in increments. Don't be afraid to start with the boat tail of the bullet mid-way in the shoulder. The Hybrids do have a short bearing surface compared to the VLDs but that doesn't mean you can experiment a little. If you have/ want too.
Take care,
Phil Hoham
Berger Bullet Tech
LONGSHOOTER
Well-Known Member
You keep asking about max col, and there might be good reason for your concern.
This cartridge is designed with a lot of freebore.
If you are going to be loading full house loads to wring out the velocity, you might want to ensure that you have enough freebore to prevent an overpressure situation. This cartridge is not unlike the Weatherbys.
This cartridge is designed with a lot of freebore.
If you are going to be loading full house loads to wring out the velocity, you might want to ensure that you have enough freebore to prevent an overpressure situation. This cartridge is not unlike the Weatherbys.
huntxtrm
Well-Known Member
Not really trying to max out the load. This is my hunting rifle. One day, when I'm more educated on it, I might go for it on a rifle other than this one. Right now, I'm just looking at stretching out my distance with as much accuracy possible with this rifle. I'm just starting out, so I don't want to push the rifles ability, or mine. Later, it sounds fun! I'm in the learning process, so I'm quite concerned with safety. Which, I all ways will be. Some of it is kind of intimidating to me now. But, a little fear keeps the mind thinking. I recon.
huntxtrm
Well-Known Member
What I'm gathering from this is. Load same gn weight at different COL, moving away from the lands. I'm going at it backasswards. Thanks for the advice
huntxtrm
Well-Known Member
Fixin to make a purchase on some bullets today. Is the 185 Classic Hunter the best I can do, and fit in the magazine? I couldn't go a little heavier? If you say go, I go. Where can I go for reload data for that round? Or does anybody have any? My hornady book, jumps from 180gn to 190gn.
Lefty7mmstw
Well-Known Member
I'd go with the 190 load data to start with.
You can also loosen up on how slow you work up your load. Once you find an accuracy node work around it but you'll shoot out the barrel before you even get a load if you don't watch it. I nearly laughed when 1/2 grain changes on the bottom end were mentioned- I'd go at least 1 until you are familiar with the rifle. Possibly even coarser on the bottom end then. Once you pass the mid charge I'd slow up but 1/10th grain for a cartridge of this size is a fart in the breeze. Benchrest guys with 30 grain powder capacities need to do this. Your rifle can eat over 100 grains of powder.
As to bullets, There is a reason I'm using the hdy 225hpbt in my rifle and not a heavy berger. I load to mag length on a remmy and I'm not single loading a magazine rifle unless I have to. Berger makes good pills and they have their place, but not in a rifle of mine that needs a jump because of freebore. I also use the 190 and 180 hdy interlock in this rifle and they all shoot well at 3.650" oal. with over .200" jump. I didn't measure exactly as I simply do not care. 1.2 - 2/3 moa accuracy no matter the conditions says enough for me.
