.243 70 gr Blitzking N140
- Thread starter Nick the foxer
- Start date
PeterH
Well-Known Member
Yes I developed a load for a guy using the 70 gr SBK with N135, In an OCW test two weights shot quite well so the attached is shown - he shot both groups and plumbed for the 39.1gr weight
243varmint
Well-Known Member
70gr are devastating on foxes out of my. 243.
Not a deer bullet!!
rms364
Well-Known Member
Shame about the “flier” lol
Ranger22
Well-Known Member
Scoggsy1978
Well-Known Member
Hi,
I have just been reading this old post which is relevant to me as I am developing a load for my Sako Finnlight in .243 using N140 and 70g Sierra Blitzkings.
I have ladder tested in 0.3gr increments from 37.4 up to 40.3gr using a chrono. I have found that all group well but once at 38.8gr the extra powder didn't equate to any real additional bullet velocity (under 100fps difference between 38.8 and 40.3grs). I have decided to stick with 38.8 grains with a bullet OAL of 2.681 inches.
Has anyone experimented with different seating depths and how that effects the outcome down range??
I have just been reading this old post which is relevant to me as I am developing a load for my Sako Finnlight in .243 using N140 and 70g Sierra Blitzkings.
I have ladder tested in 0.3gr increments from 37.4 up to 40.3gr using a chrono. I have found that all group well but once at 38.8gr the extra powder didn't equate to any real additional bullet velocity (under 100fps difference between 38.8 and 40.3grs). I have decided to stick with 38.8 grains with a bullet OAL of 2.681 inches.
Has anyone experimented with different seating depths and how that effects the outcome down range??
Hi, Scoggsy1978, I did the exact same thing as you, I worked up slowly but found that I had no significant increase for the powder used from 39 to 39.5 grains. so I settled on 39.2, so almost the same as yourself. Im getting an average of 3420 fps and my OAL is 2.681 also. I did try a little jump and extended slightly, but it didnt do any better. I use the exact same load and length for 70 grain Varmagedons, Blitzkings give me a half inch group at 100, varmagedons give me quarter of an inch. I run a 24 inch barrel from my x-bolt.
Scoggsy1978
Well-Known Member
Thanks 143-Dai.....thats good to know.
I peaked at 3222 fps using a 19" (1:10) barrel so will keep with that using 38.8gr of N140.
Interestingly I was previously using Hornady 75gr Vmax SST's and found that when testing home loads that I was consistently 1.5" high and 1" to the right! Puzzled me why!
If I remember right I think my first loads were to the right also. I worked up a little and it came back. I would think your velocity is up on the 75sst's that you were using, the 1.5 inch high could be accounted for there. I also have some Vmax 58's, they are just over an inch higher at 100 yards. They shoot super flat, but I prefer the 70's. I bought some 90 grn soft points to try, but to date have not worked up a load for them with N160. good luck with your load. its sounds right for your Sako.
Simon22ppc
Member
The current Vihtavuori manual max is 41.7 grs of N140.
Simon22ppc
Member
Sorry. With the 70gn Blitzking.
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