Reloading for accuracy/consistency help

[Jonathan_S]

I don’t crimp anything for bolt guns and none of the bullets I shoot in them even have the cannelure

I actually don’t even trim my .45-70 brass which I DO crimp

[BULLBLASTER]

Only gun I crimp for is my 375 HH. I do it because it is a compressed load and I have had the bullets push back out of the case some before. Many of the bullets I use in that have a crimp ring and I’m usually right in it. But I crimp just the same if it doesn’t have a groove or it doesn’t line up.

[hunter399]

I did wanna ask you guys a question though.

I trim every time. Keeping the case necks the same length means equal bearing surface holding the bullet in each case-thus it helps minimize inconsistency .with everybody that talks about neck tension.It really doesn't matter though.?

I don't crimp unless semi-auto rifle.

[jasnt]

Depends really. Try not doing it for a bit and see if it makes a difference in your speeds. If es goes up go back to your routine

[Magnum_Willys]

I did wanna ask you guys a question though.

I trim every time. Keeping the case necks the same length means equal bearing surface holding the bullet in each case-thus it helps minimize inconsistency .with everybody that talks about neck tension.It really doesn't matter though.?

I don't crimp unless semi-auto rifle.

I anneal, trim, fullsize, run a mandrel through necks, dip in Imperial dry necklube, sort bullets and seat to .001 and concentricity < .001.    With that done  ES will still vary between 4 and 40 depending on powder and seating depth.  I suspect at the perfect powder/depth I may be able to shortcut all the other prep. 

[hunter399]

I did wanna ask you guys a question though.

I trim every time. Keeping the case necks the same length means equal bearing surface holding the bullet in each case-thus it helps minimize inconsistency .with everybody that talks about neck tension.It really doesn't matter though.?

I don't crimp unless semi-auto rifle.

I anneal, trim, fullsize, run a mandrel through necks, dip in Imperial dry necklube, sort bullets and seat to .001 and concentricity < .001.    With that done  ES will still vary between 4 and 40 depending on powder and seating depth.  I suspect at the perfect powder/depth I may be able to shortcut all the other prep.

Question for you magnu m Willy why do you trim your brass , just wondering some are telling me it's not necessary.

[Magnum_Willys]

I did wanna ask you guys a question though.

I trim every time. Keeping the case necks the same length means equal bearing surface holding the bullet in each case-thus it helps minimize inconsistency .with everybody that talks about neck tension.It really doesn't matter though.?

I don't crimp unless semi-auto rifle.

I anneal, trim, fullsize, run a mandrel through necks, dip in Imperial dry necklube, sort bullets and seat to .001 and concentricity < .001.    With that done  ES will still vary between 4 and 40 depending on powder and seating depth.  I suspect at the perfect powder/depth I may be able to shortcut all the other prep.

Question for you magnu m Willy why do you trim your brass , just wondering some are telling me it's not necessary.

It depends alot on how well your resizing die matches your chamber.  If you have a smaller die it shrinks the brass and it has to go somewhere which is out the neck.  On mine my neck grows .010 each time which is putting it at max specs.  If I bought  a gauge and measured my neck clearance maybe I could go a bit longer.  Plus I'm pushing the brass hard so its expanding a lot. 

Your cartridge has a min and max specification for length.  I trim to min each time for consistency.  If I neck size I don't need to as it only grows .001 each time.    With the perfect fullsize die it might not grow much.  I had a custom die made off my brass by whidden but it still grows .010 with just a .002 or .003 shoulder setback.

If your brass is less than max length you don't need to trim unless anal for consistency like many handloaders are. 

[hunter399]

I did wanna ask you guys a question though.

I trim every time. Keeping the case necks the same length means equal bearing surface holding the bullet in each case-thus it helps minimize inconsistency .with everybody that talks about neck tension.It really doesn't matter though.?

I don't crimp unless semi-auto rifle.

I anneal, trim, fullsize, run a mandrel through necks, dip in Imperial dry necklube, sort bullets and seat to .001 and concentricity < .001.    With that done  ES will still vary between 4 and 40 depending on powder and seating depth.  I suspect at the perfect powder/depth I may be able to shortcut all the other prep.

Question for you magnu m Willy why do you trim your brass , just wondering some are telling me it's not necessary.

It depends alot on how well your resizing die matches your chamber.  If you have a smaller die it shrinks the brass and it has to go somewhere which is out the neck.  On mine my neck grows .010 each time which is putting it at max specs.  If I bought  a gauge and measured my neck clearance maybe I could go a bit longer.  Plus I'm pushing the brass hard so its expanding a lot. 

Your cartridge has a min and max specification for length.  I trim to min each time for consistency.  If I neck size I don't need to as it only grows .001 each time.    With the perfect fullsize die it might not grow much.  I had a custom die made off my brass by whidden but it still grows .010 with just a .002 or .003 shoulder setback.

If your brass is less than max length you don't need to trim unless anal for consistency like many handloaders are. 

Thanks I was just wondering,why some do and some don't,think I understand now.

[Magnum_Willys]

With some of the smaller 6mm - 6.5mm cartridges at modest pressures you can load with a teaspoon and a hammer and still shoot cloverleafs at 100 yards.  With big magnums you may have to massage them a little to get them to behave. 

[hunter399]

I reload for 223,25/45,243,270,7mm rem mag.

[Yondering]

Your cartridge has a min and max specification for length.  I trim to min each time for consistency.  If I neck size I don't need to as it only grows .001 each time.    With the perfect fullsize die it might not grow much.  I had a custom die made off my brass by whidden but it still grows .010 with just a .002 or .003 shoulder setback.

That's your answer right there. .010" per firing is crazy, but it's due to your sizing process, not the firing itself. If you size in a way that better matches your chamber, that problem should go away. One of the big areas I see that can cause case stretch like that is pulling the expander ball through a dry case neck with a lot of effort. Try cleaning or even lubing inside the case necks, and you may reduce stretching and also decrease runout quite a bit.

[boneaddict]

I did wanna ask you guys a question though.

I trim every time. Keeping the case necks the same length means equal bearing surface holding the bullet in each case-thus it helps minimize inconsistency .with everybody that talks about neck tension.It really doesn't matter though.?

I don't crimp unless semi-auto rifle.

I anneal, trim, fullsize, run a mandrel through necks, dip in Imperial dry necklube, sort bullets and seat to .001 and concentricity < .001.    With that done  ES will still vary between 4 and 40 depending on powder and seating depth.  I suspect at the perfect powder/depth I may be able to shortcut all the other prep.

+1  everytime

[Jonathan_S]

 
Can’t hurt as long as brass isn’t being overworked 

[jasnt]

I did wanna ask you guys a question though.

I trim every time. Keeping the case necks the same length means equal bearing surface holding the bullet in each case-thus it helps minimize inconsistency .with everybody that talks about neck tension.It really doesn't matter though.?

I don't crimp unless semi-auto rifle.

I anneal, trim, fullsize, run a mandrel through necks, dip in Imperial dry necklube, sort bullets and seat to .001 and concentricity < .001.    With that done  ES will still vary between 4 and 40 depending on powder and seating depth.  I suspect at the perfect powder/depth I may be able to shortcut all the other prep.

Question for you magnu m Willy why do you trim your brass , just wondering some are telling me it's not necessary.

It depends alot on how well your resizing die matches your chamber.  If you have a smaller die it shrinks the brass and it has to go somewhere which is out the neck.  On mine my neck grows .010 each time which is putting it at max specs.  If I bought  a gauge and measured my neck clearance maybe I could go a bit longer.  Plus I'm pushing the brass hard so its expanding a lot. 

Your cartridge has a min and max specification for length.  I trim to min each time for consistency.  If I neck size I don't need to as it only grows .001 each time.    With the perfect fullsize die it might not grow much.  I had a custom die made off my brass by whidden but it still grows .010 with just a .002 or .003 shoulder setback.

If your brass is less than max length you don't need to trim unless anal for consistency like many handloaders are. 

is it an auto loader your setting the shoulder back .003”? Any case head separating. That just seams extreme to me.  Mainly because I’ve never seen .01” of brass growth before in a single loading other than a fire form.   personally I treat my brass mouths like a muzzle. I want the “crown” to all be identical and free of those factory bumps and such. I can’t say what kind of difference it makes but it makes me feel all warm inside knowing I went the extra mile.

[Magnum_Willys]

The .010 neck growth is largely from resizing - its about .002 - .003 from shooting..   If I bump back less than .0025 my brass is snug when chambering - which mite be preferred I've just been getting better es with it not snug and I can push it a little harder.   But I'm bumping back .0025-.003 from a hot load measurement.  Its less than .002 from a mild load measurement.   I know my dies are oversizing parts of the body, ordered a custom whidden die but when it came it was worse ( .005 body resize ) - twice sent fired rounds to them same result.  If my chamber wasn't so large I wouldn't be having these die mismatches which shrink the body creating large neck growth. 

Jas - is your sized brass snug when chambering ?