Reloading - when your mag box limits your COAL

[FEENIX]

Another reason for a mono, especially in a heavy recoil rifle. Before I changed to mono's, by the time I got to the last round in the magazine……the bullet tips were so badly "flattened", I expected to see that the jacket had started to open! memtb

Are you saying a .001" of clearance is OK with monos? Monos or not, I always allow enough clearance. Also, I don't particularly appreciate touching the land. I have all kinds of monos, but C&Cs are my preferred bullets.

Below is a 117 Cayuga in my .257 WBY. .020" off the lands and .178" mag clearance.

Below is 145 Black Hole, also in .257 WBY. .020" off the lands and .189" mag clearance.

Another one with 163 Chinchaga, .015" off the lands, and .170" mag clearance.

 

[memtb]

Are you saying a .001" of clearance is OK with monos? Monos or not, I always allow enough clearance. Also, I don't particularly appreciate touching the land. I have all kinds of monos, but C&Cs are my preferred bullets.

Below is a 117 Cayuga in my .257 WBY. .020" off the lands and .178" mag clearance.

View attachment 603971

Below is 145 Black Hole, also in .257 WBY. .020" off the lands and .189" mag clearance.

View attachment 603972

Another one with 163 Chinchaga, .015" off the lands, and .170" mag clearance.

View attachment 603978

No Sir! I'm on two different forums, and this is an active topic on both.

On the other forum I stated, "I do not measure…..but, cycle a magazine through several times to be certain of function"!

I apologize for "my" confusion…..as I thought that I had posted the above comment on this forum!

My comment about the mono's was supposed to be an addendum to the above comment. A comment on another forum!

That's "clear as mud" to me, probably confused myself……I hope that this made some sense to you! memtb

 

[Tiny Tim]

When I've run into this issue, I generally like .030" or more shorter than mag length for Magnum cartridges. This seems to be fairly forgiving in terms of feeding and nose damage. I'm running .090 off to get in a Savage 300WM factory mag using 210 HVLD, and they group around .625MOA.

As YZ-80 pointed out. AR mags with polymer tips seem to allow for less clearance.

My 300 RUM is at 3.966 COAL in a 4" Wyatt's box for .015 off the lands and feeds well.

 

[std7mag]

I only have 2 rifles that the magazine is shorter than the cartridge base to lands length.

I'm like @FEENIX in that I leave 0.03" COAL shorter than internal magazine length.

 

[med358-boise]

Thanks guys for all the thoughtful replies