Problem reloading 357 mag

spyderchop

spyderchop

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Langley
Hello

When I try to seat my cast 358 diameter lead bullets it's loose
In the brass. My brass is not resized but I only fire out of one rifle..this has never happend to me before..do I need to resize? I have never had this problem with 4570 with my fourm fired Brass...I never resize. I am new to 357.

Thx
 
You must be new to reloading too because you need to resize all your cases despite whatever rifle or pistol it is fired from. The exception is neck sizing cases shot from bolt guns.
 
spyderchop said:
I am new to reloading yes..only reloaded 4570 and never resize my brass only trim to lenght if need be... am I incorrect in this?
Click to expand...

Uhmm, no. You need to resize and then trim to length. Once ammo is fired, the case expands to the chamber size and shrinks back a little but still slightly oversized. The case mouth is also expanded and needs to be sized so that they can hold the bullet on the next reload. This prevents bullet setback from a loose case neck and a potential KABOOM situation esp in semi-autos or repeaters and esp if they are stacked like in a spring loaded magazine tube.

Do yourself a favour and stop reloading for now. Get proper training before you cause serious injury to yourself or someone else. Even if this means watching lots of youtube videos or reading the new to reloading threads here. I don't mean this as a slight towards you but it is for your own safety.
 
spyderchop said:
Hello

When I try to seat my cast 358 diameter lead bullets it's loose
In the brass. My brass is not resized but I only fire out of one rifle..this has never happend to me before..do I need to resize? I have never had this problem with 4570 with my fourm fired Brass...I never resize. I am new to 357.

Thx
Click to expand...

As other folks have noted you need to resize your brass. I am curious are your 45 70 bullets oversized lead? I only ask as my jacketed .458 bullets are loose fit in my fired 45 70 brass as one would expect.
 
With low pressure rounds and a tight chamber it might be possible to make good rounds without sizing a straight case like the 45-70. Similar idea to just neck sizing.

In most cases sizing is going to be required for exactly the reason that you have run into. With higher pressures or chambers that aren't strictly round or concentric the cases might not fit back in at all. Sizing will work the brass more but also give you more consistent neck tension which is important for accuracy and a tighter neck will minimize the chance of the bullet shifting in or out of the case. This is a bigger issue with tube magazines or revolvers.
 
Buy one of these. For your own safety and the safety of those around you. Start at page one, $35.00 @ Cabela's.


135177-209534
 
I understand it is common practice to load black powder cartridges without resizing the brass, whether or not one is paper patching the bullets. I am not surprised to hear the OP is doing it and don't automatically consider him a newbie because he does so.

However, the technique is pretty much limited to straight-walled (or nearly so) brass cases that are used only with black powder, in only one rifle. Every loading technique has its place, and brass cases used with smokeless powders need to be resized.
 
The OP clearly stated he was new to reloading in post #5.
No mention of black powder and paper patching in original post.
BattleRife said:
I understand it is common practice to load black powder cartridges without resizing the brass, whether or not one is paper patching the bullets. I am not surprised to hear the OP is doing it and don't automatically consider him a newbie because he does so.
Click to expand...
 
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