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300 RUM Bullet Crimping

 
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  #15  
Old 06-21-2012, 01:19 PM
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Re: 300 RUM Bullet Crimping

Either of those bullets will work well for you. The rock chucker will do you just fine for a while. Before I found this site, I made a bad decision and bought a Lyman tmag press kit. It was horrible. So I sold it and bought a redding t-7 turret press. I absolutely love that press. As you decide to upgrade your stuff, you can come on here and sell your old items. There are always new reloaders coming on board that can utilize your old stuff. That way you get some of your money back.

I have gone to all redding dies for reloading because I just think that they are made better. Just my opinion. There are many things that you can upgrade to later. I got super tired of dispensing powder and weighing on a scale so I bought the RCBS Chargemaster 1500. That is also something that you can save up for as you go along as it is a great product.

One tool that I just can't live w/o is the RCBS APS hand priming tool. It is fast and easy to use. I am just giving you some items that you might upgrade to later as you save up.
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  #16  
Old 06-21-2012, 01:34 PM
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Re: 300 RUM Bullet Crimping

You can buy just about any gear you want and most of it is pretty good as far as reloading is concerned. I love my rock-chucker and it's one of the strongest out there, but if I went turret I'd go Redding for sure. As far as trimmers, my rcbs is just fine, but you've gotta keep it tightened down or it could walk. I'm using the rcbs uniflow measure then hand trickling the last 1/2 grain. I don't bother with a case length guage, I set the bullet to jamb, then make measurements and make a pedro up for that round and it stays in the die box.
As far as the load data on the 300 U, i usually run 93gr rl25 with a hornady 180 and a 215 in rem brass. It'll go 3280 fps out of my rem 700 and will hold 1/2" 100 yd groups. I also shoot 190's and 225's but those aren't book loads.
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  #17  
Old 06-21-2012, 07:52 PM
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Re: 300 RUM Bullet Crimping

I've got RCBS uniflow measure, trickler, and hand priming tool. I've got RCBS dies, but am noticing everyone seems to be using redding dies. That may come later. For now, I'll see how the RCBS dies work for me. Still wondering why my factory loaded Rem. brass is showing case neck splits after one firing. I suspect it may be from the factory crimp. Anyway the factory Barnes ammo I started shooting last year all appears to be good. Any theories you guy's have on that may be helpful.
I do see where this would become a time consuming process, and over time you would want to minimize time.
I'll be sticking with book loads for awhile, till I get a little more knowledgeable, and experienced. I'll do a little more reading up on it, and I should have that gun back soon. Spent a lot of money on it. Hopefully I get the results I'm looking for. In the meantime, I'll work on some 7mm-08 loads, and see what I can do with that. That gun is a Pro Hunter with Bergara barrel. It shoots 3/4" 100 yd. groups with factory ammo. Not bad for a break action single shot. Reloads could hopefully tighten that up a little more.
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  #18  
Old 06-21-2012, 08:02 PM
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Re: 300 RUM Bullet Crimping

If you can find data on it, use that data. I'm talking non book loads for mil-surp type stuff. Don't play with mil-surp until you feet are wet. And take anyone's posted wonder load with about a pound of salt. Unless you can find correlating data, it's probably a work-up to mask a problem like a loose chamber or long throat. Tread very lightly with unknown data. Your rifle and face are worth more than a few fps.
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  #19  
Old 06-21-2012, 08:19 PM
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Re: 300 RUM Bullet Crimping

Good advice. Safety, and equipment are most important. I'm not looking to milk every last fps known to man. Velocity is secondary to me. I'll trade some velocity for accuracy any day. Like I said for now I'll definitely be airing on the side of caution. Using only components, and loads from manual.
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  #20  
Old 07-03-2012, 09:31 PM
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Re: 300 RUM Bullet Crimping

Hey guy's, to let you all know where I'm at as a first timer to reloading. I have loaded my first test rounds in 7mm-08. Have not started with the RUM yet, as I have not gotten it back from the builder yet.

The 7-08 is a TC Pro Hunter with a bergara barrel. I know not an accurate action type, but I dont intend this to be a long range gun either, although after testing my first ever loads I was surprised by the increase in accuracy over factory loads. All factory loads I've shot have been very inconsistent, and averaging around 2" 100 yd. groups. My handloads averaged out at .997, the best being .553 I think it was a good start, and was pleased with my first effort, though I"m sure that can be improved on. Who knows, that little break action single may possibly make a decent little 300 yd hunting gun.

I started with a moderate load of 44 gr. of H414, 210 primers, new Rem cases, and 139 gr. SST's. I determined that factory Hornady ammo was set back .135 off the lands. I loaded 6 rounds, 2 three shot groups at 4 different seating depths. .013 off, .045, .070, and .106. I just have an RCBS FL die set, so exact seating depth is not easy. I pulled several bullets in making dummy rounds. Those weren't the exact numbers I was going for, but what I ended up with. Did not want to be pulling any more bullets. My best groups were from the .106 off lands. a 3shot .553 group, and a .932 3 shot group. I also had fairly good grouping at .070 off lands, but not quite as good, a .725 ,and a 1.205. This sounds like an awful lot of jump to me. Is that possible? It sure did shoot much better set back off the lands, but will not shoot any factory ammo well, which is a little more back from the lands.Even POI changes with factory loads.

Anyway that is my first attempt. I may look at concentricity, as I tend to think that may be factoring in. Do you guy's have any suggestions as to technique, strategy, and direction to go from here? My thought has been to find seating depth, and work load out from there. Have not chrono'd anything yet.

Last edited by cserwin; 07-03-2012 at 09:35 PM. Reason: miss spelling
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  #21  
Old 07-03-2012, 09:46 PM
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Re: 300 RUM Bullet Crimping

Quote:
Originally Posted by cserwin View Post
Hey guy's, to let you all know where I'm at as a first timer to reloading. I have loaded my first test rounds in 7mm-08. Have not started with the RUM yet, as I have not gotten it back from the builder yet.

The 7-08 is a TC Pro Hunter with a bergara barrel. I know not an accurate action type, but I dont intend this to be a long range gun either, although after testing my first ever loads I was surprised by the increase in accuracy over factory loads. All factory loads I've shot have been very inconsistent, and averaging around 2" 100 yd. groups. My handloads averaged out at .997, the best being .553 I think it was a good start, and was pleased with my first effort, though I"m sure that can be improved on. Who knows, that little break action single may possibly make a decent little 300 yd hunting gun.

I started with a moderate load of 44 gr. of H414, 210 primers, new Rem cases, and 139 gr. SST's. I determined that factory Hornady ammo was set back .135 off the lands. I loaded 6 rounds, 2 three shot groups at 4 different seating depths. .013 off, .045, .070, and .106. I just have an RCBS FL die set, so exact seating depth is not easy. I pulled several bullets in making dummy rounds. Those weren't the exact numbers I was going for, but what I ended up with. Did not want to be pulling any more bullets. My best groups were from the .106 off lands. a 3shot .553 group, and a .932 3 shot group. I also had fairly good grouping at .070 off lands, but not quite as good, a .725 ,and a 1.205. This sounds like an awful lot of jump to me. Is that possible? It sure did shoot much better set back off the lands, but will not shoot any factory ammo well, which is a little more back from the lands.Even POI changes with factory loads.

Anyway that is my first attempt. I may look at concentricity, as I tend to think that may be factoring in. Do you guy's have any suggestions as to technique, strategy, and direction to go from here? My thought has been to find seating depth, and work load out from there. Have not chrono'd anything yet.
Some rifles like more jump than others. My 270's like little to none, but my 300 ultra is .200" set back and my old 7mm ultra was .500" set back. The overbore rounds will have more free-bore, as they need it to help control pressure. Of course you have to play with loads more and watch your ammo closer to make it shoot. Every one of my dies is a regular set, don't think they are automatically inferior. Rcbs dies turn in about .030" per turn for regular dies, so that may help you a bit setting length next time. Also, when you get a load, make a dummy round(pedro) and label it so you can come back to it easier.
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