As some of you will remember my last thread talked about the rather huge groups that rifle was firing when it came out of the box. 6 to 8 inches being the norm and a few select handloads going down to 3 inches.
1. Recrowning the muzzle
2. Free floating the barrel except mild pressure at the very end of the barrel channel.
3. Polishing the feed ramp so it would stop deforming the ammo tips.
4. Re-enforcing the recoil lug area with fiberglass bedding.
5. Re-enforcing the fore stock area with epoxy.
The average size of the groups dropped to 1.0 inches using the same loads.
With a couple tweaked handloads i was also able to obtain a few .50 to .75 inch groups.
I was amazed at just how well RL-15 powder did with this cartridge using 220 to 225 grain bullets. High velocities, no high pressure signs and very good accuracy.
One load using 63.0 grains of RL-15, Remington brass, a Winchester mag primer, and a 220 grain Speer bullet loaded to 2.80 COL. Consistantly obtained 2,840 fps and fired the two smallest groups.
It was very clean burning.
I was rather surprised, but I have seen this load on Whelen Browns 35 caliber site and also at the Reloaders Nest site.
The velocities were, 2,837- 2,841,-2,859- 2,837- 2,843- 2,840-2,839 - 2,821-and another 2,859.
I used a light roll crimp. This brass was once fired and I resized it about 85 to 90%.
Other loads I tried yesterday with eitehr Speer 220s or Sierra 225 grain boat tails:
60.0 grains BLC-2 averaged 2,560 fps. Very dirty.
62.0 grains BLC-2 averaged 2,700 fps super dirty and was blowing primers.
56.0 grains IMR 3031, averaged 2,682 fps. clean, 1.25 inch group.
58.0 grains H-4895 with Sierra 225 grain. averaged 2,738fps, 1.00 inch group.
58.0 grains H-4895 with Speer 220 flat base, averaged 2,675fps, 1.75 to 2.0 inch group.
The last two loads were exactly the same except the bullet. Check out how much faster the Sierra Boat tail was going.
I will try to get some photos up...