OCW test .222

[SCJ429]

having a look at your load in quickload shows the
18.5gr load as a light load doing 2987fps @36119psi and 84,3% fill
21gr is as high as l would go doing 3310fps @51586psi and 95.7% fill

the max psi for this round is 53664psi

lMHO the 18.5gr is a safe load but l wouldn't go down any further and the 21gr is just under as high as l would go

l think you are just about at the next node and should try up to 21gr but as SCJ429 has said maybe do an OCW in smaller increments to 21gr

your 20.5gr group is a good group and is doing 3248fps @48061psi with a 93.4 fill

worth a bit more testing

Nice work MM, I might have to get myself a Quickload suite. What does it say for 47 grains of 2209 behind a 168 grain Berger VLD in a 7mm08?

[Am88]

Would love a 7mm one day, either 7mm-08 or 7mm Rem Mag. would be nice too.

[SCJ429]

What about the 7mm RUM?

The 7mm08 is not mine. Just working on a load for a friend. I use a 7mm Win Mag, lots of fun.

[Am88]

I remember reading about barrel life on the RUM being significantly less, also I'm not a long range hunter and I'd still like to keep it a bit tamer on recoil, a 7mm RUM delivers 25% for energy at 300 yards I just read, sounds like something I would not enjoy shooting too much

Edit: My alopogies, I read that about the .300 RUM and barrel life, I can imagine it would be the same with the 7mm too however.

[Stix]

[
Nice work MM, I might have to get myself a Quickload suite. What does it say for 47 grains of 2209 behind a 168 grain Berger VLD in a 7mm08?

It says to block your ears...!!...

I did some 95% to just compressed loads with a 120 vmax & 2209 once....didnt seem too bad from behind the butt...
But people at the range were complaining about the noise & one monkey was jumping around like the whole place was going to blow up...

T'was pretty loud for a 7-08 though...

[marksman]

"Nice work MM, I might have to get myself a Quickload suite. What does it say for 47 grains of 2209 behind a 168 grain Berger VLD in a 7mm08?"

overloaded
114.2% fill, 2792fps, 70167psi
quickload is good to get a good guess but its not written in stone, you still need to real world test
the data l put in is an average, to have a better idea the load needs to be tweaked using better data and a chrony
TBH l think it is right down your alley from what l have seen from you in the past

45gr of 2209 is as far as l would go but you may find pressure at that because the extrapolation is an average
at 45gr for a 24" barrel there is 109.3% fill, 2665fps @ 59723psi with the 168 berger hunting vld #28501

[SCJ429]

Thanks for that, the ADI data is 44.2 grains doing 2550 fps which is a bit slow. I will push it a bit, 47 grain is not compressed but I will see what the rifle likes. I was hoping to get to 2700 fps but I don't want to loosen the primer pockets after one firing.

I like loud Stix, and if I can put off the bloke next to me, even better.

[Stix]

Lol scj...
When the guy next to me mentioned i was getting progressively louder with a questionable/curious tone (as if to ask politely if i was aware of what i had loaded), i told him that group he just heard was at about 100%, & that the next load are compressed...
To which he pulled a face somewhat similar to this-- --,quickly finished his group, packed up his gear & moved to another bench...

Ill send you mine so you can do two 7-08 rifle loads at once... ...or i can send you my brass as i think the necks are just a cock hair too thick & need a skim...(its 308 brass)...

My rifle seemed to deal with the big loads ok...primers were fine & no stiff bolt etc...but weighing less than 3kg you were well aware of having shot a rifle off the bench & it did hammer the brass a good bit...so i went back to sissy loads with 2208.

Part of me is curious to know how naughty i was according to this quickload bizo, but dont think i want the world to see it...
It was an interesting experiment for me being mostly a small 22 cal shooter & as that was the hottest ive ever pushed a rifle...

[SCJ429]

I like to see what a case can do, no point having the motor idling when you are trying to win a race. I am using Lapua 7mm08 brass, I would be more confident if I had 308 Palmer brass with small rifle primers. I don't want to push 70,000 psi but did want to try for speeds that a 308 can push a 168 bullet. Almost no point having a BC advantage if I shoot them at 2550 fps. I will post the results in another thread rather than continuing to hijack 222s thread.

[Am88]

no point having the motor idling when you are trying to win a race.

I like that

[Am88]

So didn't get alot of time but this afternoon tested 20.5gr, 20.7gr and 20.9gr. No primer flattening at 20.9gr either. Tested 4 of each. 20.5gr pretty much came out the same so didn't bother posting. POI doesn't seem to be changing which is good. I also have no doubt in my mind I pulled 1 if not 2 shots on the 20.7 group. Also I forgot my bloody sand bags so was a very poor rest setup I used was a bit unsteady so no doubt it would improve. Also threw in a pic if the rifle, my A1 with Doctor 6x42 Classic. Loving it.

[Stix]

Looks good AM...

How big are those squares/grid graduations on the target...?

More to come...?

[Am88]

Yes more to come Stix. Not sure what but for one I think I will do some tests with 18.3, 18.5 and 18.7, and I would like to play with lengths on the 20.7 maybe.

[marksman]

lmho Am88 you can get some benefit from playing with seating depths but its not enough to make a worth while change
you will find the charge weight and volume changes are doing the same already just a different way
but if you want to be sure there nothing wrong with having a crack, its all more shooting

the rifle is looking very good

[Am88]

MM I thought the seating depth was his whole point of the OBT method? I'm not too sure how much difference it makes never played much. And sorry Stix they are one inch squares.

[marksman]

what l have found is that using seating depth to fine tune after an OCW test does give you results when tested at longer distances eg... 300y
but l have always found that when l find my sweet spot from the OCW that is as good as it will be consistently
the extra seating depth tests are just fine tuning and you will see the differences at long range only

l have looked into OBT through Chris Longs web site and use quite a bit of his knowledge, he is a very intelligent, helpful and kind man but my figures have never been the same as his, l am not saying his figures are wrong just different
once l find the sweet spot in my rifle and use the barrel time numbers l find into quickload with different components and rifle with same barrel length it is the sweet spot, it works every time without real world OCW testing
to be able to do this though you have to know how to use and tweak quickload as Chris Long explains on his web site

there are a few things that can change things that have to be considered eg.. being a loose bore or a tight bore
l hope you understand what l'm trying to say

[Am88]

Yeah ok MM fair enough I think I understand, at the end of the day I guess as well, I know the capabilities and this will by no means be a long range rifle, most shots will most likely be inside 200m with the majority being 50 to 100m I would say, sometimes even less. I would like to do a few more loads up at 20.7 and 20.9 and NOT forget my sandbags and hopefully Ill have a better result, I am yet to load 18.3, 18.5 and 18.7 yet, I don't mind having 2 different loads as these seem like thay are all going to have a very similar POI and keeping the hotter loads for the intended purpose.

[SCJ429]

what l have found is that using seating depth to fine tune after an OCW test does give you results when tested at longer distances eg... 300y
but l have always found that when l find my sweet spot from the OCW that is as good as it will be consistently
the extra seating depth tests are just fine tuning and you will see the differences at long range only

l have looked into OBT through Chris Longs web site and use quite a bit of his knowledge, he is a very intelligent, helpful and kind man but my figures have never been the same as his, l am not saying his figures are wrong just different
once l find the sweet spot in my rifle and use the barrel time numbers l find into quickload with different components and rifle with same barrel length it is the sweet spot, it works every time without real world OCW testing
to be able to do this though you have to know how to use and tweak quickload as Chris Long explains on his web site

there are a few things that can change things that have to be considered eg.. being a loose bore or a tight bore
l hope you understand what l'm trying to say

What do the values under nodes 1 to 7 mean? They have a range of values something like 0.7856 to 1.0365, I cannot see what they mean.