260 brass formed from 308 Lapua Palma brass

[Quick]

G'day all,

I had a thought and was wondering if anyone has tryed it to have the case capacity of the 260 Rem but the consistancy that the 6.5x47 Lapua enjoys party due to the small primer pocket and flashhole, I know you wont have the shoulder angle that the 6.5x47 Lapua has.

Anyone tryed it out?

[Brad Y]

Might be an interesting test. I want to do an ackley 260 but I would guess that using that kind of case capacity with a small primer might have some issues. The standard case may be a whole different kettle of fish.

[Quick]

Yeah, hope someone who has a std 260 would be willing to see if it works. If it didnt, it would at least mean we have eliminated that as an idea.

[BATattack]

you can form 6mm super LR form palma brass so you should be able to do 260 pritty easy. from memory we just used 7mm, 6.5mm then 6mm bushings in the .308 die then formed the sholder and final neck diameter in the 6mm super LR die.

the brass thickened in the neck but once you run an expander mandrell to remove any potental doughnut this may allow you to turn your necks to desired diameter even if your reamer was originally designed as a "no turn"

[Quick]

BAT,

I know you can form other cals from it as its really just 308 brass but would having the smaller primer pocket give an advantage with the 260 the same as its thought to with the 308? Im still testing it with the 308 at the moment.

Im thinking you could potentially have the accuracy of the 6.5x47 Lapua with the case capacity and increased velocity/performance of the 260. The only thing your missing is the 30 degree shoulder but really then we are talking about the 6.5 Super LR if we do that.

Just a random thought I had today and was wondering if anyone had tryed it out.

[Brad Y]

I think there are plenty of accurate 260's with the large primers. Dont know if the effort in necking down, trimming and neck turning/reaming will be worth it. Plus im not sure if the case dimensions are exactly the same or if a 308 necked down would be a few thou over or undersize. Try the accurate shooter forum- there are plenty of guys there shooting 6.5mm cartridges who may know.

[BATattack]

we formed up some small primer 6mm super LR cases and my friend shot a 8" grupe at 1000 out of a trued rem with a palma barrel and a rem HS precision stock!! so it wants to shoot!

i would say the biggest benifit would be that the case head has more strength due to the smaller hole and will last longer.

the real question is what have you got to loose? you could go the same direction as everyone else and have an accurate 260 or you could try something and maby have a VERY accurate .260 nothing ventured nothing gained.

[Quick]

I'd agree.

just wish I had a 260 to test it with

[Brad Y]

Just been googling posts on US sites. One where Kevin Thomas of Lapua USA says he wouldnt recommend it due to slower powders used in the 260 (ie 2209 and slower) Mind you he was talking to a hunting crowd so he was also worried about cold temps too. I found another where people had done it, but it was stated conditions were favourable ie no snow etc and they used a faster burning powder (2208) and lighter bullets i think.

BAT- interesting you have a 6 super LR there. Would like to know some load info if you have it. Ive been looking at the 6.5mm super LR this evening and its pretty decent looking!

[dummos]

Sorry, I know this is a very old thread but just wonderding if during these past couple of years whether anyone has tested the theory. I have recently swtiched to palma brass in my 308 barnard and am having very good results with 3020fps (zero pressure and still climbing at 44.8 gr 2206h) my standard deviations are now averaging under 5fps which is much better than I was getting with the standard lapua brass. I also have from another rifle a set of micrometer dies and .260 lapua cases so I was thunking about getting a second barrel for the barnard for some occasional f-open fun. In my previous rifle I had good accuracy results with my .260 and am very fond of the caliber. I thought about going to a 284/shehane but it would be quite costly for me at the moment. But since I already own dies etc I am hoping to try and be competitive with it and see how I go. But af5er using the palma cases in my 308 I am very interested in seeing how it would compare necking them down. I have a step down die and have resized 308 brass before with no trouble or doughnuts. Just after Info if anyone has tried it and perhaps thoughts on whether the 260 in standard for is capable of being competitive.

[Brad Y]

Yes it worked well.

[macguru]

I have formed 260 brass from 308 cases, both winchester and lapua. I only fired the win ones in my 260AI and they formed fine. The lapua cases have a bit of a doughnut as the brass is thicker, and you would probably want to neck turn it a little bit. I agree the lapua 308 -> 260AI small flash hole is a good idea to try, if i get around to it in my 260 AI ill let you know ....

[Longranger]

Pity about the price of the palma brass.

Anyone seen the price of it lately?

[Norm]

Yeah the price is an issue. But if it lasts longer then it offsets the cost somewhat.
I have been using a variety of brass types and makes to form 7-08ai brass over the last year. The best brass so far has been .308 Lapua Palma brass. It lasts longer and is more accurate.

[williada]

Norm, have you done anything with magnum primers in that small hole Palma case? Any comments welcomed. Its something I have never done. David.