Redding Bushing Size?

[Autorotate19]

Hi I recently purchased some Redding Type S Match dies for a 7mm Rem Mag Im having built. Im planning on starting with Norma brass and Nosler Long Range Accubonds. Which bushing size should I start out with?

Thank you

 

[dkhunt14]

Measure a loaded round and get a bushing .002 and .003 under. Matt

 

[Rick Richard]

Agree. You need to measure a loaded round WITH the intended brass to be used for reloading. Dimensions vary a tad between various brass manufactures.

 

[Corey Schwanz]

You will likely end up with a bushing size in the neighborhood of .311, but as stated above, you will need to measure the loaded round neck diameter to be sure. Find the OD of the loaded neck and then subtract .002" to get your bushing size. You may want to experiment with one on either side of it, depending on ho much tension you want.

 

[yogibearmech]

Readings web site has an instructional article that tells you how to do it. Here is the link.
Bushing Selection | Redding Reloading Equipment: reloading equipment for rifles, handguns, pistols, revolvers and SAECO bullet casting equipment

 

[dkhunt14]

I would never do a .001 under a loaded round. Some cases could be smaller or brass could be hard and spring back. Then you wouldn't have enough tension. The recoil of shells in a mag might even move the bullets. I have found even in my match guns that more neck tensions even things out and is usually more accurate. Sometimes I even go .004. Matt

 

[Lone Hunter]

I run .003 in my match ammo. Seems to do a great job. It works well for my hunting rifles too.

 

[Autorotate19]

I appreciate all the replies. I'm going to load up a round and measure it.

 

[7mmstwfan]

Can you share the final bushing size? I ordered Norma brass for 7mm Rem Mag and will be ordering Redding Match series dies. Looking at 2 bushings .307 and .308 based on loaded 7mm STW cases. Hard to measure a loaded case when first need to order the dies and guess at the bushing size.

 

[Autorotate19]

.310 was the bushing I ended up with.