Range report: 4350, 25 WSSM, .257AI....more
Howdy all,
I came back from the range yesterday happy with some, not so happy with others.
First, I found that H4350 extreme doesn't change hardly at all from 20 degrees to 80 degrees. It does go down a little when shooting at 0-7 degrees...but not much. This tested using a .257AI using 117gr. Sierra Boattail spitzer Gamekings. last winter at cold temps and yesterday at 80 deg. It cooled off on me yesterday because I wanted to see what would go on with them if the weather got really hot like last week...around 90 deg. Anyhow, the Hornady 117 gr. SST produced excellent groups and about 30 fps more on average. 45 grs. of H4350 Extreme pushed them out to 2840, and 2810 for the Sierra's.
Second, I was really pleased using H4350 in the 25WSSM using 45 gr. of H4350 driving a Nosler 110 Accubond @ 2990 in my Win 70 Super Shadow. It also produced the best group I've ever had with a heavy bullet in that rifle... .708"
Third, RE15 doesn't have the poop that 4895 does in the 7mm TCU using 140 gr. bullets. It runs about 100 fps less(in similar temps). However, last week I used it in the 6.5x55 and found that I had gotten to the top of the pressure limit too soon, 40 gr. behind Norma 130 gr. golden Target. I didn't have the chrono with me but by using JBM trajectory calculation, I was pushing those bullets out at 3050...way too hot for 6.5x55, especially in near 90 deg. weather.
Fourth, Prvi Partisan shoots the 7.65 174gr. bullet faster than it puts out the 7.5 Swiss, unusual since the Swiss case is larger. Must be a download thing for the 1889 Swiss rifles. On average they were about 200 fps slower. 2480 for the Swiss and 2680 for the Argentine.
Anyways, just some range info.
EDIT:
Something seems amiss here, last winter I used 45 grs. of 4350 and got 2849 as an average at 22 degrees. I did step up and get a little more velocity using 46 and 46.5 grs. However, the day I posted this I only got 2810 out of the 4350 at 80 degree's...and the powder came out of the same can. So back to the drawing board for some more checking.
I came back from the range yesterday happy with some, not so happy with others.
First, I found that H4350 extreme doesn't change hardly at all from 20 degrees to 80 degrees. It does go down a little when shooting at 0-7 degrees...but not much. This tested using a .257AI using 117gr. Sierra Boattail spitzer Gamekings. last winter at cold temps and yesterday at 80 deg. It cooled off on me yesterday because I wanted to see what would go on with them if the weather got really hot like last week...around 90 deg. Anyhow, the Hornady 117 gr. SST produced excellent groups and about 30 fps more on average. 45 grs. of H4350 Extreme pushed them out to 2840, and 2810 for the Sierra's.
Second, I was really pleased using H4350 in the 25WSSM using 45 gr. of H4350 driving a Nosler 110 Accubond @ 2990 in my Win 70 Super Shadow. It also produced the best group I've ever had with a heavy bullet in that rifle... .708"
Third, RE15 doesn't have the poop that 4895 does in the 7mm TCU using 140 gr. bullets. It runs about 100 fps less(in similar temps). However, last week I used it in the 6.5x55 and found that I had gotten to the top of the pressure limit too soon, 40 gr. behind Norma 130 gr. golden Target. I didn't have the chrono with me but by using JBM trajectory calculation, I was pushing those bullets out at 3050...way too hot for 6.5x55, especially in near 90 deg. weather.
Fourth, Prvi Partisan shoots the 7.65 174gr. bullet faster than it puts out the 7.5 Swiss, unusual since the Swiss case is larger. Must be a download thing for the 1889 Swiss rifles. On average they were about 200 fps slower. 2480 for the Swiss and 2680 for the Argentine.
Anyways, just some range info.
EDIT:
Something seems amiss here, last winter I used 45 grs. of 4350 and got 2849 as an average at 22 degrees. I did step up and get a little more velocity using 46 and 46.5 grs. However, the day I posted this I only got 2810 out of the 4350 at 80 degree's...and the powder came out of the same can. So back to the drawing board for some more checking.
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