.243 WIN Winchester Brass Differences

[varmint slayer]

Has anybody noticed a difference in muzzle velocity or a POI shift when firing Winchester brand .243 brass that is loaded from unprimed new brass in the bag vs firing Winchester brass that came from factory loaded ammo and then reloaded? I have noticed that my load of 46.5 grains of H1000 with 105 Amax out of the brass from the bags seems to shoot a little different than the stuff that came from once fired factory Winchester ammo. I have noticed that the headstamps are a hair different between the two.



The lettering is a touch different and the 3 in .243 is different as well. Maybe these are made in two different plants or something?

I haven't checked the FPS between the two but when zeroed for the Win brass with the "flat top 3" in .243 which is brass from the bag, the "round top 3" rounds hit about a half inch high and about 3/4 of an inch left. All I can really find these days is once fired factory brass but I don't have enough of it to make a lot of 250 for the Snipershide Cup in May. I have enough with once fired and new out of the bag but so far and admittedly not a lot of testing as it has been snowing here the last week and a half, but if the two different headstamps have a big difference in case volume or something then I guess I'll have to develop a separate load for them and try to match it to the brass from the bag.

So to make a long story short, has anybody else come across this situation with Winchester brass or any type brass?

 

[varmint slayer]

Nobody has any input on this? Not even a smart ass comment haha...

 

[8AteEight]

So, if I read right, you need more bag brass? I may be able to find some at LGS and ship it to you. PM if interested,ill see if I can find any.

 

[varmint slayer]

So, if I read right, you need more bag brass? I may be able to find some at LGS and ship it to you. PM if interested,ill see if I can find any.

Well maybe not as a few kick ass guys have stepped up and offered some new in bag brass at non insane prices so I think I will end up with enough to make it work. I still would like to know if anybody has seen any difference in POI with the same charge but just the slightly different headstamps.

Thanks for the offer though. I appreciate it!

 

[turbo54]

Why don't you measure the case water capacity of several pieces of each type?

Seat a spent primer, weigh the case, zero your scale, put a drop of soap in a cup of water (eliminates surface tension), fill the case with water, dry up any spillage, then reweigh.

Report back what you find.

 

[varmint slayer]

Why don't you measure the case water capacity of several pieces of each type?

Seat a spent primer, weigh the case, zero your scale, put a drop of soap in a cup of water (eliminates surface tension), fill the case with water, dry up any spillage, then reweigh.

Report back what you find.

I was going to try this as soon as I had enough time. Just curious if anybody had noticed this same issue in the mean time. Thanks for advice though. I've never done a capacity test but I think I can handle it with your instructions.