Starline Brass

[Kurt]

Chris.

That Danielson prolate is a very good bullet if you can get it duplicated right. The bullet in the center is Brent's .45 prolate. The left is my .44 elliptical and the right is my .44 prolate. All three bullets shoot very good.
The reason Brent can patch his bullets just short of the ogive is the way he designed the bullet with the small step down from the shank to the ogive. This helps keeping the ogive from setting back from bare lead making contact with the land tops or groove bottom if the alloy is to soft.
The 4 bullets below I ran some alloy hardness tests using the .45-70 and the .45-90 to see how soft I can go to keep the profile of the nose and not change the BC of the bullet's design. The bullet shot from the .45-90 (right bullet) was to soft. The center .45-70 bullet had the same alloy temper as the .45-90 on the right. The .45-70 is just right with the powder charge used in it to hold the alloy from having the ogive set back unlike the one in the .45-90. If you look close that alloy let the nose get set back enough to make contact with the top of the lands and this is what happen to you to get gray on your patch.
The bullet shot from the .45-70 on the far left is almost to hard and did not get full engraving.