Vince24 wrote:Hi guys
I got some very cheap Speer hotcor spitzer 140gn in 6.5x55 ($35c!) which I wanted to use for shooting at the military club the 100m distance: 5 shots standing, 5 shots kneeling, 5 shots prone.
So I look into the ADI data for a quick load development, having in mind to use 2208 for minimum recoil and cost. Yes I know 2209 or 2213 are better for 6.5 but I thought that for a military style shoot it would not make a big difference.
My surprise when looking at the ADI data for the 140gn Speer:
ADI gives the same powder load for 2206H and 2208 !?
see below ADI table extracts.
Basically both powders starting at 32.5 and ending at 36gn.
Isn't it surprising or am I missing something?
Then there is a big jump in powder load from 2208 to 2209 and more big jumps for 2213 and 2217.
GRT finds the maximum proposed 2208 load very mild, while it gets more nervous with 44 grains of 2209, sending the warning message when you approach maximum pressure.
140 GR. SPR 2206H.264"3.030" Starting 32.5 grain 2305 fps38100 cup Maximum 35.8 grain 2493 fps45700 cup
140 GR. SPR 2208.264"3.030" Starting 32.5 grain 2312 fps37500 cup Maximum 36.0 grain 2528 fps46000 cup
140 GR. SPR 2209.264"3.030"Starting 39.5 grain 2418 fps38600 cup Maximum 44.0 grain 2617 fps45700 cup
140 GR. SPR 2213SC.264"3.030"Starting 42.5 grain 2382 fps38100cup Maximum 47.0 grain 2586 fps45700 cup
140 GR. SPR 2217.264"3.030"Starting 46.5 grain 2423 fps37600 cup Maximum 51.5 grain (C) 2651 fps46000 cup
According to GRT the recoil goes from 17 joules with the maximum 2209 loan to 12 joules with the maximum 2208 load.
To be compared with the 27 joules of a 58.5gr load of 2209 in my 1903
(another interesting information that GRT provides)
Cheers
Vincent
LawrenceA wrote:Dunno what the gun is but my Tikka loves 2208.
The load is over the ADI max so I wont print it but I am getting 0.22 moa and that is 5 shots at 100 with Nosler competitions parked as far out as possible.
Basically it is worth investigating 2208
northdude wrote:Never seen that before
in2anity wrote:you sure the lugs haven't let go on it?
Vince24 wrote:This is all well and good, but that does not answer the fundamental question I wanted to raise:
Is it logic to have the same powder loads in 2208 and 2206H?
I am still a newbee in handloading, but normally, for a given projectile, the slower the powder, the more you can put?
For that broken Swede, I would love to know what kind of load it took to get to that outcome...
Vince24 wrote:This is all well and good, but that does not answer the fundamental question I wanted to raise:
Is it logic to have the same powder loads in 2208 and 2206H?
I am still a newbee in handloading, but normally, for a given projectile, the slower the powder, the more you can put?
For that broken Swede, I would love to know what kind of load it took to get to that outcome...
SCJ429 wrote:Vince24 wrote:This is all well and good, but that does not answer the fundamental question I wanted to raise:
Is it logic to have the same powder loads in 2208 and 2206H?
I am still a newbee in handloading, but normally, for a given projectile, the slower the powder, the more you can put?
For that broken Swede, I would love to know what kind of load it took to get to that outcome...
There could be all sorts of reasons that caused this bolt to be stuck, many of them not related to the powder charge.
slower powders are more bulky and fill your cases faster, stick powders also take up more room than ball powders that also have more surface area and burn faster. Best powder for your case is one that gives you the speed you want while filling the case over 95%. Some reloaders want to use less powder and save a little money so they use smaller amounts of faster powders. This is great if you still get the accuracy you want but these type of loads are generally not the most accurate.
SCJ429 wrote:I get the impression from reading this forum that some reloaders want to use 30 grains of a faster powder rather than 40 grains of the ideal powder to save money. I wonder if those same guys run into accuracy problems caused by inconsistent burns and spikes in pressure. Slower powders are kinder on throats as you mentioned Deye243.
SCJ429 wrote:I get the impression from reading this forum that some reloaders want to use 30 grains of a faster powder rather than 40 grains of the ideal powder to save money. I wonder if those same guys run into accuracy problems caused by inconsistent burns and spikes in pressure. Slower powders are kinder on throats as you mentioned Deye243.
bladeracer wrote:I simply start with AR2206H, I use a heap of it so I have heaps of it on hand. If I can't get a load to shoot then I'll try other powders. It's not about money as much as the versatility of the powder. If you only load one cartridge then choose the powder best suited to that cartridge, if you load dozens of different cartridges then use the most versatile powders.
Billo wrote:Nah Bladeracer I'm pretty sure its a Remington cause broken bolt handle
Billo wrote:OK you fella's might be right, Yes obviously its a Swede !! Anyway case is still stuck in the action and I bought it, PTA in a week or so and then the real fun begins....
Im thinking some hydraulic oil and some heat, then whack the bolt stump to get the action open ?? will try and find out what caused the bolt lock up....
Sorry for the thread derailment
in2anity wrote:I'm with you Blade. If you are turning over rifles, versatile powders like 06H is a no brainer. Just reload and go shoot. For offhand and sitting positions, it will make little difference whether you use the "optimal" powder vs slightly faster burning. The error will overwhelmingly stem from the shooter, whereby powder choice is kinda irrelevant - so long as it works O-K. That's literally 2/3rds of Service Rifle competition. An example; I use AR2207+125gr out of my Spaniard-762 for offhand and sitting, but then switch to AR2208+155gr for 300m prone... where accuracy starts to get important. Horses for courses.
The other factor is recoil impulse - a faster powder will always "feel" like less recoil because of the fast burn. Something that can only be observed with much experience on a light recoiler. I literally choose AR2206H in my 303 because I prefer the "feel" of it over longer recoil impulse of the "optimal" AR2209. And with improved comfort and reduced recoil, ultimately comes better Service Rifle scores. It's all tradeoffs - one should resist the urge to generalize.
We don't all shoot glassed bipod.
bladeracer wrote:I use AR2206H in .30-06, although with the 178gn BTHP I use 57gn of AR2209 because it does shoot more consistently. My neighbour wanted to reload for his .30-06 only with 180gn bullets with no interest in loading for anything else, so I got him to get AR2209 as a better choice for that specific usage.]