7mm wby and IMR 7828

UniversalFrost · May 15, 2009, 10:39 AM

Ok,

Just picked up a german made mark V weatherby in 7mm WBY mag and scored almost 1k of bullets with it. I just picked up some new brass and am going to work up loads for it.

Only 2 catches are

1. I only have large rifle and large rifle benchrest primers left on hand

2. only have access to IMR 7828 (actually scored 4 pounds at the gun shop yesterday for $15 a pound). I have plenty of IMR4895 and Varget for my non magnums, but this was the only powder i could find that was recommended for the 7mm WBY.

i already know that my velocities and pressures will be lower than advertised due to the non magnum primers, but that is something I will have to live with until I can score some magnum primers.

I have never loaded IMR7828 and have been reading that it is super slow (my 26" barrel will come in handy for that) and gives a bit more kick than say RL22.

Anyone use IMR7828 in a 7mm (wby, rem, STW, etc...) ?

JOE

Scorch · May 15, 2009, 11:10 AM

IMR7828 is indeed a very slow powder, and is recommended only for loads with heavy bullets (>154 gr in 7mm Weatherby in Hornady #7). Large rifle primers should work well.

GeauxTide · May 15, 2009, 07:28 PM

With 154s in my 7Rem; however, I would never use LR primers with 7828.

UniversalFrost · May 15, 2009, 08:46 PM

well, I talked a neighbor out of 100 large rifle magnum primers in exchange for some cci benchrest large rifle primers and I will load up some of each and see just how well the LR compare to LRM's.

now just waiting for the gun to arrive so I can go and test the loads out.

May 15, 2009, 10:39 AM	#1
UniversalFrost Senior Member Join Date: February 20, 2006 Location: Ohio Posts: 2,300	7mm wby and IMR 7828 Ok, Just picked up a german made mark V weatherby in 7mm WBY mag and scored almost 1k of bullets with it. I just picked up some new brass and am going to work up loads for it. Only 2 catches are 1. I only have large rifle and large rifle benchrest primers left on hand 2. only have access to IMR 7828 (actually scored 4 pounds at the gun shop yesterday for $15 a pound). I have plenty of IMR4895 and Varget for my non magnums, but this was the only powder i could find that was recommended for the 7mm WBY. i already know that my velocities and pressures will be lower than advertised due to the non magnum primers, but that is something I will have to live with until I can score some magnum primers. I have never loaded IMR7828 and have been reading that it is super slow (my 26" barrel will come in handy for that) and gives a bit more kick than say RL22. Anyone use IMR7828 in a 7mm (wby, rem, STW, etc...) ? JOE __________________ Lifetime member VFW and NRA "Quando Omni Flunkus Moritati" (when all else fails play dead) -Red Green

May 15, 2009, 11:10 AM	#2
Scorch Senior Member Join Date: February 13, 2006 Location: Washington state Posts: 15,248	IMR7828 is indeed a very slow powder, and is recommended only for loads with heavy bullets (>154 gr in 7mm Weatherby in Hornady #7). Large rifle primers should work well. __________________ Never try to educate someone who resists knowledge at all costs. But what do I know? Summit Arms Services

May 15, 2009, 08:46 PM	#4
UniversalFrost Senior Member Join Date: February 20, 2006 Location: Ohio Posts: 2,300	well, I talked a neighbor out of 100 large rifle magnum primers in exchange for some cci benchrest large rifle primers and I will load up some of each and see just how well the LR compare to LRM's. now just waiting for the gun to arrive so I can go and test the loads out. __________________ Lifetime member VFW and NRA "Quando Omni Flunkus Moritati" (when all else fails play dead) -Red Green

May 15, 2009, 07:28 PM	#3
GeauxTide Senior Member Join Date: April 20, 2009 Location: Helena, AL Posts: 4,423	With 154s in my 7Rem; however, I would never use LR primers with 7828.