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300 RUM load development questions

 
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  #57  
Old 03-13-2013, 01:00 PM
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Re: 300 RUM load development questions

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Originally Posted by cerwin View Post
Your right Rifleman, shell holder. We're not done here yet if you guy's are gonna get me up to speed. Bart seems to have a wealth of knowledge, and so do you. I read on here justifiable, reasonable defenses for one end of the spectrum to the other in nearly every aspect of the loading process. I at times become more confused after being on this site. More questions than answers, but thats a good thing. Questions lead to more questions, which in turn lead to more answers. In the end the answers I have to find for myself, but couldn't find any of them without all input, and knowledge from all you guy's. I think any dumb question is the one that isnt asked, and I'm full of dumb questions lol!!!

More to come fer sher!
I have a little knowledge and experience, but Bart and others have a lot more than I.

Bottom line is there are a lot of ways to skin the reloading cat and many of them work very well. There are highly experienced handloaders with different philosophies and methods that all get good results.

I think the main thing is to develop a good process that works for you and be as consistent as possible. You'll probably fine tune it over the years or maybe make major changes in your process.

I have made several major changes along the way and learned a lot in the process and I am still learning and refining my process. It's never ending.

This site has a wealth of experience and knowledge and I have benefited greatly from it.
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You will never know how much it has cost my generation to preserve your freedom. I hope you make good use of it.
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  #58  
Old 03-13-2013, 01:53 PM
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Join Date: May 2012
Location: Northern Colorado
Posts: 92
Re: 300 RUM load development questions

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Originally Posted by MontanaRifleman View Post
I have a little knowledge and experience, but Bart and others have a lot more than I.

Bottom line is there are a lot of ways to skin the reloading cat and many of them work very well. There are highly experienced handloaders with different philosophies and methods that all get good results.

I think the main thing is to develop a good process that works for you and be as consistent as possible. You'll probably fine tune it over the years or maybe make major changes in your process.

I have made several major changes along the way and learned a lot in the process and I am still learning and refining my process. It's never ending.

This site has a wealth of experience and knowledge and I have benefited greatly from it.
I agree completely Rifleman. It's gonna be a life long learning adapting experience. If it weren't for this site, I'd still be looking at equipment and wondering "what does this do"? I know a few guy's who reload, but they are mostly handgunners, and when it comes to rifle loading they think they have a winner with 1 1/2" 100 yd groups, so I ended up here, and this site is awesome!
I do believe that I'm on a good track so far with A process that appears to be working. Most certainly not the best, or most efficient, but something to build on, and adapt to my needs. I've got lots of experience yet to be had. I sure do thank you for the input and direction. It really helps.

STAY TUNED!
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  #59  
Old 03-14-2013, 11:52 AM
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Join Date: May 2008
Location: South of Canada and North of Wyoming
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Re: 300 RUM load development questions

Cerwin,

Per request, here's my current handloadiing process. Some of this is actually new for me.

Starting with new brass,

Lube w/ Imperial Sizing Wax including inside of neck and FL size with bushing and expander. I will use a bushing that will shrink neck to about 2 thou smaller than expander ball.

Measure all case lengths and pick a length to trim to.

Chamfer outside and inside necks with VLD tool

Debur flash holes

Square and uniform primer pockets

Weigh brass and cull anything excessively out of acceptable weight range.

Weigh bullets and cull the heaviest and lightest out for load development, fowlers, etc. This is not necessary for CE or GS bullets.

Prime pockets with RCBS hand priming tool. I like to feel the primers being seated. It gives a good idea as to the condition of the brass.

Measure powder with RCBS Chargemaster, Spot check charges with RCBS 10-10 scale occasionally

Seat bullets. I use Reading micrometer and Horandy New Dimension. I will be putting VLD plugs in them and upgrading the Hornady's with micrometer tops.

Fired brass. Run through the tumbler with crushed walnut shells. Am considering getting a Lyman ultrasonic cleaner.

Then repeat process.

FL size just enough so brass fits snugly but easily into chamber. I will probably adjust the neck bushing to leave about a .020 fired donut around the base of the neck.

Remeasure fired and sized brass again and trim if necessary.

Clean primer pockets.

Seat primers.

Charge cases and seat bullets.

I may add a step to the new brass prep the ream inside of necks to remove irregularities in thickness.

I will play with using and not using an expander ball, check the runout and see of there is a shot group difference. If not, i will remove the expander ball and use a neck bushing to size for about 2 thou neck tension.

And that's where I am in handloading process.

I load for 22-250, 25-06, 7 RM, 300 WSM and 300 RUM. 6.5 WSM and 6-284 on the way.

I use standard non-bushing FL dies for the22-250, 25-06 and 7. That may will probably change.
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You will never know how much it has cost my generation to preserve your freedom. I hope you make good use of it.
~ John Quincy Adams
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  #60  
Old 03-14-2013, 05:41 PM
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Location: Northern Colorado
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Re: 300 RUM load development questions

[QUOTE=MontanaRifleman;778763]Cerwin,


Square and uniform primer pockets

This I have not messed with. I've been a little hesitant to mess with primer pockets. Any tips on that?


Measure powder with RCBS Chargemaster, Spot check charges with RCBS 10-10 scale occasionally

I considered buying a Chargemaster, but am still using an RCBS balance beam, not the 10-10, but I think a 505, its the entry lavel scale.


Fired brass. Run through the tumbler with crushed walnut shells. Am considering getting a Lyman ultrasonic cleaner.

I've got a Hornady ultasonic cleaner, and a tumbler. I love that ultrasonic cleaner. I'm still using both from time to time, but may stick with the ultrasonic. It sure as heck cleans both inside and out.


I may add a step to the new brass prep the ream inside of necks to remove irregularities in thickness.

Would this be an alternative to neck turning?


I load for 22-250, 25-06, 7 RM, 300 WSM and 300 RUM. 6.5 WSM and 6-284 on the way.

Sounds like you've got your hands full with all that going on. I cant seem to find enough time to work with the 2 I've got now, and I'll be adding another next month. It keeps me busy, and out of trouble lol.
Like you say, theres different ways of skinning that cat. My process is not much different. I have for this RUM about every type of die there is, and tried them all. Once I figured out my runout issues, all the die types have done good. I did end up eliminating the expander ball though, and am working with Redding bushing dies now.

What are you loading your RUM for? Hunting? I'm curious as to exactly what components are you using, and what your getting out of it as far as velocity, and consistency. Are you chronoing?
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  #61  
Old 03-14-2013, 05:51 PM
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Re: 300 RUM load development questions

Hey, I see I just got bumped up to Bronze member. I got a raise! hahahaha
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  #62  
Old 03-14-2013, 06:12 PM
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Re: 300 RUM load development questions

Quote:
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Originally Posted by cerwin View Post

Sounds like you've got your hands full with all that going on. I cant seem to find enough time to work with the 2 I've got now, and I'll be adding another next month. It keeps me busy, and out of trouble lol.
Like you say, theres different ways of skinning that cat. My process is not much different. I have for this RUM about every type of die there is, and tried them all. Once I figured out my runout issues, all the die types have done good. I did end up eliminating the expander ball though, and am working with Redding bushing dies now.

What are you loading your RUM for? Hunting? I'm curious as to exactly what components are you using, and what your getting out of it as far as velocity, and consistency. Are you chronoing?
I haven't loaded for several of these for while. As soon as it warms up a little and I get some powder and bullets in I'll be getting busy.

For the 300 RUM, I am using Rem brass. Not the greatest, it lasts about 4-6 firings with max loads. I have a Sendero 300 RUM and another being built. In the Sendero I worked loads for

180 E-Tips, 98 gr Retumbo 3400 fps
200 AB's, 93 Retumbo, 3200 fps
210 Bergers, 92 gr Retumbo, 3130 fps

Accuracy was about .5 MOA for all loads. The E-Tips were most accurate out of my rifle.

Bullets were seated to about .020 off the lands and too long for the mag box, My new build will have a longer mag box.

I will develop loads in the RUM for 200 CE bullets and 230 Hybrids. I will try Retumbo and RL33.

Yes, I chrony. I will be order an acoustic chrono this spring. And yes, The 300 Rum will be used for hunting.
__________________
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You will never know how much it has cost my generation to preserve your freedom. I hope you make good use of it.
~ John Quincy Adams
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  #63  
Old 03-14-2013, 06:17 PM
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Join Date: May 2012
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Re: 300 RUM load development questions

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Originally Posted by 7stw View Post
First things first! Your runout issue, is probably q result of your resizing process, and it is hard at times to correct it. Typically what happens is when you resize, and when you pull the expander ball back through the case, it sometimes " pulls " the neck a little out of square, or centerline, with the body of the brass. So, then when you seat the bullet, it is then exaggerated. You need to ensure that your expander ball is dead center of your die. Also , lubricate the INSIDE of the neck before the resize stage, that way, the expander will not bind, and that's usually what starts the distortion.
As to the jump, when I used to load VLD's in my RUM, I loaded to box length, then manipulated the load in small increments to find the "sweet" spot. The RUM is free bored by design, and unless you are single feeding, you can not touch or come close to the throat, and still fit into the box.
Read your instructions that came with your dies to ensure you are centered correctly with the expander, and that will help out a lot. Good luck, and enjoy the ride.
Hey stw,
I got the runout issues corrected, and things are looking good with VLD's. My initial seating depth test with a moderate chg 88 gr Retumbo shot sub 1/2 MOA at 200 yds. at .010 off lands.
I only have access to a 200 yd range short of traveling, or packing a couple miles back in to the forest to shoot. Do you have any recommendations on how to proceed with fine tuning a load? I dont really want to burn my barrel out searching for a load, but I'd love to burn it out LR shooting with a good tuned load.
At 88 gr. its shooting good, but I think theres got to be something on the upper end that will shoot as well.
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