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Hot Topic (More than 30 Replies) Reloading consistency (Read 2132 times)
willyr1
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Reloading consistency
Aug 27th, 2017 at 8:35pm
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I'm loading for the first time in over ten years so have a few questions that have arisen. Loading for my .270 and I'm getting a large difference in velocity 71fps  is the biggest variation with ar2213sc. 48fps is the biggest difference with 2209. Is this normal? To improve my group size I want to get this right down so next time I'll pay a lot more attention with weighing the powder but anything else to watch for?
  

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Micky Duck
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Re: Reloading consistency
Reply #1 - Aug 27th, 2017 at 9:06pm
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most accurate load........ many a GREAT load has been ruined by a chrony.
  
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willyr1
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Re: Reloading consistency
Reply #2 - Aug 27th, 2017 at 9:21pm
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Hahaha yea I know. It seams that the 110gn Barnes TSX with 56.5gn 2209 doing 3231fps with no pressure signs were the most accurate. Nothing seams to group as tight as id like. Even an old load that I used ten years ago when I was shooting and reloading a lot was twice the size of what it once was. I can put a lot of thus down to me being rusty and needing more time behind the trigger to hone old skills but the variation in speed makes me think maybe it's not just me?
  

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Walker
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Re: Reloading consistency
Reply #3 - Aug 28th, 2017 at 7:57am
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Start with new brass, size, trim and neck turn to get them all as diamensionally similar as possible. Load with powders that fill the case completely then you'll see a better SD. Getting consistantly 20 or less is pretty good for a hunting rifle.
  

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6.5x55bjai
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Re: Reloading consistency
Reply #4 - Aug 28th, 2017 at 8:19am
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Micky Duck wrote on Aug 27th, 2017 at 9:06pm:
most accurate load........ many a GREAT load has been ruined by a chrony.

?
  
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stug
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Re: Reloading consistency
Reply #5 - Aug 28th, 2017 at 8:59am
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6.5x55bjai wrote on Aug 28th, 2017 at 8:19am:
Micky Duck wrote on Aug 27th, 2017 at 9:06pm:
most accurate load........ many a GREAT load has been ruined by a chrony.

?


What he is meaning is that a lot of shooters are happy with a group/load, then they run it over a chrony and find the velocity is too low, or the ES is too high. If they hadn't shot it over the chrony they would have been happy with it.
  
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willyr1
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Re: Reloading consistency
Reply #6 - Aug 28th, 2017 at 9:14am
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What is the ES stug?
  

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6.5x55bjai
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Re: Reloading consistency
Reply #7 - Aug 28th, 2017 at 10:09am
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stug wrote on Aug 28th, 2017 at 8:59am:
6.5x55bjai wrote on Aug 28th, 2017 at 8:19am:
Micky Duck wrote on Aug 27th, 2017 at 9:06pm:
most accurate load........ many a GREAT load has been ruined by a chrony.

?


What he is meaning is that a lot of shooters are happy with a group/load, then they run it over a chrony and find the velocity is too low, or the ES is too high. If they hadn't shot it over the chrony they would have been happy with it.

Ah, so it's the shooter that ruins the load, by making a   decision based on data from the chrony, instead of being happy with the group size for the purpose required or the velocity and also probably trying to claw those extra few fps that the animal won't notice. TIC  Smiley
None of my loads have ever been ruined by my chronograph. Felt at times like ruining my chronograph though.
  
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Re: Reloading consistency
Reply #8 - Aug 28th, 2017 at 10:20am
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willyr1 wrote on Aug 28th, 2017 at 9:14am:
What is the ES stug?


ES is extreme spread. Highest to lowest velocity for cartridges loaded with same weight powder etc. ideally the ES should be below 20fps.
  
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Re: Reloading consistency
Reply #9 - Aug 28th, 2017 at 10:55am
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willyr1 wrote on Aug 27th, 2017 at 8:35pm:
I'm loading for the first time in over ten years so have a few questions that have arisen. Loading for my .270 and I'm getting a large difference in velocity 71fps  is the biggest variation with ar2213sc. 48fps is the biggest difference with 2209. Is this normal? To improve my group size I want to get this right down so next time I'll pay a lot more attention with weighing the powder but anything else to watch for?

What sort of groups are you getting?

Without knowing your setup, experience, Walkerís advise is pretty valid. How old is your bras? Is it all one brand, and so on. What are your scales like? So many variables. Otherwise it is all about consistancy in every aspect of the process.

Out last week with a mate doing work on a 284 and was getting very high ES @ 76 with 2213sc and 26 using 2209. Work still in progress as velocity is still low but in the 284ís case the 2209 gives more flexibility. None of this helps you though as you have a different rifle and different cartridge.

Shot some factory Winchester 223 ammo recently (first time I have used factory ammo for many many moons) and was astounded at how bad the ES was. Mind you the accuracy was crap as well.
I have seen real good groups shot at 100yds with high ES and likewise piss poor groups with low ES.

  
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Walker
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Re: Reloading consistency
Reply #10 - Aug 28th, 2017 at 5:40pm
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Theres even another litltle twist, allot of hunting projectiles and some target projectiles have a variation in weight and size per box. If you weigh all of a box of 130grn 270's 30% could be slighly under weight, 30% correct and the other 30% overweight. if you start doing long range target shooting seriously then you weigh and sort into the three groups, then shoot as seperate batches.
  

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willyr1
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Re: Reloading consistency
Reply #11 - Aug 28th, 2017 at 7:11pm
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Thanks for the info. Few good things to think about. The rifle is a Weatherby vanguard. It will be around 1500-2000 rounds old. I got in new 14 years ago and has been relatively unused in the last 10 years. So in the first 4 years i put a lot of work through it and always cleaned it but maybe not as thoroughly as I should have and sometimes not as soon  after it was used as I should have but the bore looks in good Nick despite the abuse and amount of rounds on a hot barrel it's had. The brass is harnady once fired from the same rifle. Full length resize but not batch weighed. The scales I have been using are a bit dicky and I've found sometimes they stick a bit so possible that this could have added to the issue. The best group I got was 30mm  with an old load that used to shoot half that easy off the bench at 100m. The worst group was the factory hornady I've been using hence where the once fired hornady brass is from. I've still got 40 rounds of the shit and it's grouping 3 inch at 100m so I might pull it all and re weigh the powder cause it's shit and I only want the brass to start reloading.
Cheers and I hope this is enough info to say I'm on the right path or something need to change?
  

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Walker
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Re: Reloading consistency
Reply #12 - Aug 28th, 2017 at 7:27pm
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Try giving the bore a polish with autosol. Nice long strokes up and down the bore and you'll 'feel' any rough spots which you can then concentrate on.
  

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Walker
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Re: Reloading consistency
Reply #13 - Aug 28th, 2017 at 7:31pm
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You need to give it a good clean and de-copper first. Copper tends to build up in the throat so pay more attention there.
  

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Homer
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Re: Reloading consistency
Reply #14 - Aug 28th, 2017 at 7:50pm
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Walker wrote on Aug 28th, 2017 at 7:27pm:
Try giving the bore a polish with autosol. Nice long strokes up and down the bore and you'll 'feel' any rough spots which you can then concentrate on.


G'Day Fella's,

Please keep the Autosol for your car, and don't put it any where near a good barrel, it will eventually ruin it.

Willyr1, If you want consistent velocities and groups, you need to have everything else consistent.
So start with trimming all your Same Brand and Batch of cases to the same length (case neck turning is not required on a hunting rifle). Then lightly chamfer/debur the inside of the case necks.
If your .270 cases are the same one's you were reloading 10 years ago, you may need to anneal them. Or get some new one's, if you can't remember how many times they have been reloaded.
Re-size these cases using sufficient case lube (Trial and Error but best to start off with to much and work back until they get a bit sticky). You can always wipe off the excess case lube, after sizing, but it's difficult add more lube, if the case is stuck in the die!
Seat your primers to be just below flush the case.
Weigh your powder charges to be within, 0.1 of a grain of each other.
Gently seat your bullets to a predetermined Over All Length (OAL). I usually seat them to be 0.020" to 0.030" off the bore lands, inside the barrel.

After the ammo is loaded, you need to do the following.
Get a target that matches your scopes reticle, as an aiming point.
Get a good and steady front and rear rest/sand bags etc.

I hope that helps

Doh!
Homer
  

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