243 Peterson SRP
- Thread starter rafale
- Start date
Dusty Stevens
Shiner
I do not like srp brass with a 243. Cant get it to shoot small but i can with lrp
If you're using slow burning powders out of a 243, chances are the small rifle primer pocket is going to cause you issues. I would recommend going with H4350 or R-16 if you can for the small rifle primers. Otherwise, go back to large rifle with the slower powders. The slower burning powders are going to cause inconsistent ignitions with the small primer pocket. Good luck.
Dusty Stevens
Shiner
That is why the comp match needs a lrp just as any case in that approx capacity when used with slow powders- 260, 7-08, creedmoor, 308, etc
I' m thinking about 6 Creedmoor not the 6 comp match .
Dusty Stevens
Shiner
Oh ok. You said CM- thats comp match. About the same as a 243 as well.
I think it's more powder make / grade than burning rate specific. My 7-08 main match load uses necked-down Lapua 308 Win Palma SRP brass and 47.1gn N160 in a moderately compressed load. Year-round consistency has been excellent and I've had many good placings in Short/mid-range F-Class matches, nearly always against those using much more muscular cartridges. It has had the occasional longer distance outing too including a 1,000 yard BR comp which saw under half-MOA groups.
Top end F/TR competitors here invariably use SRP 308 brass these days with mostly Viht powder loads running at up to 47gn but I've seen 50gn (and a bit) N150 used. This gives superb results and we shoot outdoors 52 weeks of the year in England and Wales. Although we don't see New England, never mind Montana/Wyoming type winter temperature levels, 308 with 185/200gn N150 loads perform well throughout January and February without need for additional long-range elevations or inconsistency.
There is an ambient temperature point though where I'm convinced performance will suffer, likely just above freezing and certainly below where N150/160 will fall off and performance will collapse. In some winter tests I ran in year one of having Palma 308 brass, N140 appeared to be adversely affected on a day at ~3-4 deg C (mid 30s F) although N150 did fine. Interestingly, the allegedly harder to ignite Hodgdon H414 'spherical' grade performed brilliantly in these conditions in the SRP brass and outperformed the LRP Lapua brass based control loads. Hodgdon CFE223 when it later arrived was another matter entirely and simply didn't ignite properly in Palma brass loads even in reasonable (low 60s F) temperatures - nearly every round hangfiring, a couple of complete FtF examples out of 50 rounds, terrible ES values and MVs well down on same charge LRP equivalents.
Every serious UK 6mm / 6.5mm Creedmoor long-range F-Class competition shooter I've met to date uses Lapua brass which is of course entirely SRP. As Peterson becomes more widely available I expect its SRP variant to see some use too. These people are (like the 308 F/TR SRP users) running some serious speeds and pressures - which is primarily why they run SRP - and whilst case life is excellent, barrel life isn't - especially in 6mm Creedmoor.
Laurie,
Just wondering what your primer of choice is? Good info, thanks for sharing.
Paul
In the 7-08 I use Rem 7 1/2BRs that are a good few years old - they used to be the cheapest of the match SR primers here some years back and I bought thousands and am still using them.
When I shot 308 F/TR a lot, my load used CCI-BR4s which IME are a bit warmer than most. Most GB F/TR team members used F205Ms back when I was a team member in 2013, can't comment on today's practices.
The Russian Muroms are very popular here now (Wolf / Tula brands in the US). The latest SR model from this outfit which is named 'Small Rifle 223 Rem' on the carton sleeve seems to be an excellent performer. I believe Murom developed it for US XTC shooters as an alternative to the older KVB-223M SRM which was a standard pellet in a thicker / harder cup as some of the new ball powders needed a more vigorous primer to ignite properly. (I suspect CFE223 is what this refers to.)
When I shot 308 F/TR a lot, my load used CCI-BR4s which IME are a bit warmer than most. Most GB F/TR team members used F205Ms back when I was a team member in 2013, can't comment on today's practices.
The Russian Muroms are very popular here now (Wolf / Tula brands in the US). The latest SR model from this outfit which is named 'Small Rifle 223 Rem' on the carton sleeve seems to be an excellent performer. I believe Murom developed it for US XTC shooters as an alternative to the older KVB-223M SRM which was a standard pellet in a thicker / harder cup as some of the new ball powders needed a more vigorous primer to ignite properly. (I suspect CFE223 is what this refers to.)
H
Hello Laurie,
I had very good results last summer with Peterson 243 SR and N 165 . I feel that I can't go wrong with N 160 Vitha powder. I' m agree with all about
243 LR and slow powder but it will be an experiment and of course I Like to know different advice .
Hello Laurie,
I had very good results last summer with Peterson 243 SR and N 165 . I feel that I can't go wrong with N 160 Vitha powder. I' m agree with all about
243 LR and slow powder but it will be an experiment and of course I Like to know different advice .
N165 is a lovely powder if it fits the application. It appears to be easy to ignite, untemperamental, temperature tolerant, and as it's a cool burning propellant that is very kind on barrels. The downsides are it's relatively bulky and has a low specific energy compared to say H4831sc so you often end up with compressed loads and/or lower velocities than you might get from others.
I like N165 so much that I'd use it in everything if I could, but it's not exactly suited to low case capacity to bore size designs! As it is, I've used it almost exclusively in 284 Win and Shehane with 175/180s, 6.5X55 in match form with 140s and it's the usual go-to powder in the UK for the 6.5-284. I did try it in 7-08, but even with a switch from my usual Lapua to hi-cap Winchester brass and a chamber throated for 3-inch COALs, charges ended up just too compressed to reach decent velocities, so COALs were all over the place.
I have a 6SLR coming shortly and I was intrigued by the Bulletin piece last week on Joe Hendricks Jr's 6mm Comp Match Eliseo XTC Match Rifle with the 6CM designed by his father to allow the use of slower cooler burning powders compared to the more common smaller case 6XC. N165 is claimed to give a near doubling of barrel life in this high-round count discipline. If I can get hold of some small primer Peterson 243 I'll try that as the SLR parent case out of interest, this being a not too different 6mm design. (We have a few outlets here for Peterson cases, but AFAIK it's all the large primer type that is imported apart from some SP 308 Win match.)
http://bulletin.accurateshooter.com/?s=Joe+Hendricks+Jr&submit=Search
I like N165 so much that I'd use it in everything if I could, but it's not exactly suited to low case capacity to bore size designs! As it is, I've used it almost exclusively in 284 Win and Shehane with 175/180s, 6.5X55 in match form with 140s and it's the usual go-to powder in the UK for the 6.5-284. I did try it in 7-08, but even with a switch from my usual Lapua to hi-cap Winchester brass and a chamber throated for 3-inch COALs, charges ended up just too compressed to reach decent velocities, so COALs were all over the place.
I have a 6SLR coming shortly and I was intrigued by the Bulletin piece last week on Joe Hendricks Jr's 6mm Comp Match Eliseo XTC Match Rifle with the 6CM designed by his father to allow the use of slower cooler burning powders compared to the more common smaller case 6XC. N165 is claimed to give a near doubling of barrel life in this high-round count discipline. If I can get hold of some small primer Peterson 243 I'll try that as the SLR parent case out of interest, this being a not too different 6mm design. (We have a few outlets here for Peterson cases, but AFAIK it's all the large primer type that is imported apart from some SP 308 Win match.)
http://bulletin.accurateshooter.com/?s=Joe+Hendricks+Jr&submit=Search
Oh, I'm 99% sure it will be Large Primer with his Comp Match use in XTC. It was the Bulletin mention of the key N165 employment that caught my attention given my regard for this powder allied to the upcoming 6SLR. With Peterson making SP 243 brass, that was an afterthought and secondary. I intend to kick off with LP 243 brass as with my last 6SLR, but if I can get a box of SP I'd definitely try it out of curiosity if nothing else. I could of course start with 308 Lapua Palma SP as with my 7-08, but .30 to 6mm is a lot of necking-down and neck-turning.
I would also like to use the Peterson 260 SP variant, but that's not an option in my 6.5mm cal rifle as it uses an FN SPR action with a fat, loose-fitting firing pin and would need a pin-turning / bolt bushing job - an expensive exercise here. This rifle was bought as a 308 and its first rebarrel was to the then newish 6.5X47L. Primer blanking at not a lot above starting load pressures saw it rechambered to 260 very quickly in order to return to LP brass.
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