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Reloading Techniques For Reloading


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Please help the new guy.

 
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  #1  
Old 02-16-2014, 03:35 AM
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Join Date: Apr 2013
Posts: 84
Please help the new guy.

I am very new to reloading. Just started with my 260rem. I did a lot of research and noticed that 4350 was a good powder to use so thats what I wanted to start with. With supplies being very hard to find, I was able to find some A4350. With a practice I was quickly able to cut the size of my groups in half. The problem I'm having is the differences in speed each round has. They very any where from 1-70 fps. I was very precise with my powder. I weighed each charge with a digital scale to make sure they were exact, and used a trickler to adjust. I evan double checked a few times to make sure. Is this problem caused by the type of powder I'm using or am I missing something?
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  #2  
Old 02-16-2014, 09:32 AM
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Join Date: Jan 2008
Posts: 1,028
Re: Please help the new guy.

Could be a number of things. Primers would be my first thing to change along with proper case prep. One thing that has helped me is removing the burr inside the case of the primer flash hole. If you are using Lupua cases they don't have a burr because the holes are drilled not punched. AA4350 is a good powder. I have used it for years and found that in most cases it is within what different lots of IMR 4350 would be as to load data.
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  #3  
Old 02-16-2014, 10:50 AM
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Join Date: Dec 2011
Location: Michigan
Posts: 1,079
Re: Please help the new guy.

Quote:
Originally Posted by JOHNNIE WALKER View Post
I am very new to reloading. Just started with my 260rem. I did a lot of research and noticed that 4350 was a good powder to use so thats what I wanted to start with. With supplies being very hard to find, I was able to find some A4350. With a practice I was quickly able to cut the size of my groups in half. The problem I'm having is the differences in speed each round has. They very any where from 1-70 fps. I was very precise with my powder. I weighed each charge with a digital scale to make sure they were exact, and used a trickler to adjust. I evan double checked a few times to make sure. Is this problem caused by the type of powder I'm using or am I missing something?
I would guess that your powder charge accuracy is not the driver of your velocity inconsistency. There are a bunch of things guys do to reduce velocity extreme spread (ES). Changing primers or powders, making sure neck tension is as consistent as possible, finding a "sweet spot" for powder charge, playing with seating depth, etc.

Before you go about changing a million variables, I think it would be good to look into some areas that may lead you to believe you have an ES issue where none exists:

What Chrony are you using?

Is your 70fps variance in the same day of shooting?

Are your loads at outdoor temp when you start and stop shooting (not from a warm car or pocket)?

What is your routine (cooling between shots, cleaning, etc)?

What are your groups, and at what range?

Is the ES that you are observing effecting your drops at the range you hope to shoot?

Sorry for the 20 questions, but the more we understand about how you are getting these results, the more likely you are to get advice that can get you to an easy solution.

Brandon
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  #4  
Old 02-16-2014, 02:35 PM
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Join Date: Jun 2012
Posts: 56
Re: Please help the new guy.

consistency starts with your cases! you need to weigh them and sort them before and after you prep them, different case weights will have different internal volume and will perform different from shot to shot if not separated, this is another cause of velocity extremes, if you want to get you ES down you need to do all the needed work to fully prep your cases, this includes turning the necks, along with the other info you have been givin
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  #5  
Old 02-16-2014, 03:33 PM
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Join Date: Apr 2013
Posts: 84
Re: Please help the new guy.

This what I'm using-
Rem Brass
41.8 gr A4350
140gr SST
CCI BR-2 primers
This loads produces very consistent groups well inside of .5 @100 yds. I have shot a few groups that were 1 ragged hole, no joke.
I'm using Hornady dies and a hornady press. I played with this load several times before taking it to a friends to use his chrony. I'm not sure what brand it was. I shot fifteen rounds through it, and was very concerned about the differences in speed. It was around 15 degrees out. Everything was sitting out and at the same temp. I wasn't shooting fast and there was no pattern to the differences. With this load being so accurate I really didn't think it would have this big of a difference in speed between shots. Thats kind of why I was concerned. Am I missing something?
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  #6  
Old 02-16-2014, 03:53 PM
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Join Date: Dec 2011
Location: Michigan
Posts: 1,079
Re: Please help the new guy.

Quote:
Originally Posted by JOHNNIE WALKER View Post
This what I'm using-
Rem Brass
41.8 gr A4350
140gr SST
CCI BR-2 primers
This loads produces very consistent groups well inside of .5 @100 yds. I have shot a few groups that were 1 ragged hole, no joke.
I'm using Hornady dies and a hornady press. I played with this load several times before taking it to a friends to use his chrony. I'm not sure what brand it was. I shot fifteen rounds through it, and was very concerned about the differences in speed. It was around 15 degrees out. Everything was sitting out and at the same temp. I wasn't shooting fast and there was no pattern to the differences. With this load being so accurate I really didn't think it would have this big of a difference in speed between shots. Thats kind of why I was concerned. Am I missing something?

Some chronographs are prone to error depending on lighting, conditions, or just their overall capability. If it were me, I would take that combo that shoots one hole at 100 and stretch it out to the longest range you intend to shoot it at. If it still holds 1MOA or less, don't fix what ain't broke. If it opens up dramatically at longer ranges (vertically more than horizontally) it will be time to start tweaking.

My 2C

Brandon
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  #7  
Old 02-17-2014, 02:02 PM
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Join Date: Jul 2009
Location: Northern MN
Posts: 205
Re: Please help the new guy.

+1 on the above posts...

By his results it sounds like the OP is starting out right and doing a good job....

My first thought also..."the chrony"....Light & weather conditions with even the good ones can cause fits...also distance to chronograph...12'-15' should be a minimum....

As mentioned above the longer range test above is the best thing to do in my opinion before changing anything...

Randy
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