I always hestitate a little bit doing this, but then I really liked shared information so here goes...
As some you know I have been testing the the newer Speer Gold Dots, both 250 grain BC .165 and the 300 grain BC .233 ( these are published BC's from Speer) - both .452's. I had excellents results on paper fired from a A&H inline.
This test was done with a homemade from various parts TC Hawkin with a fast twist Green Mountain blank barrel. I installed fiber optic sights on the barrel. The front sight is a Williams ramp sight with a fiber optic open hood. The rear sight is a standard TC fiber optic adjustable sight. I went with the ramp sight and hood because the hood offers somewhat of a tunnel. Placing the front bead on the animal the encircles the impact area, I believe this gives me a little added measure of accuracy and with my 61 year old eyes everything helps. I admit I am a scope shooter so the added appearance of a circle helps the psychy.
I was and have been using 90 grains of t7 fffg to drive the 300 grain Noslers I normally shoot for elk ar 250 grain for deer. After sighting the gun in at 25 yards I moved the target back to 75.
Shooting the Speer GD - 300 gr. HPin an MMP HPH-24 black sabotwith 90 grains did not impress me for grouping.. Shot #2 was my fault not the gun's, it isstill hard for me to get use to a set trigger. On the target shots 1 through 4 were actually the 13, 14, 15, and 16th shots of the session.
After completing this string I decided I would back down to 80 grains and I produced in my mind a much better group. Shots 5 through9 - and 9 darn it all to heck was again my fault - the pressure got to me shooting a decent group with open sights - I really wanted to drop #9 right in between 6 & 7.
On paper reading Speer's literature about these new bonded core bullets and should hold together and have controled espansion. I regret that i did not get to test the last part here at the end of our season - but next year will come.
Thanks for your time...