The load is as follows, W/W brass, a healthy dose of newly manufactured RL-7(Bofurs), Fed 210M primers, Mt.Baldy 550gr FNGC sized .459" seated to 2.500". I used Hornady dies with an RCBS expander sized .454". With high performance cast or jacketed loads, I find an expander sized .004-.005" smaller than projectile size provides optimum neck tension. I also provide a health crimp administered by the Lee FCD. The load is about 10% compressed. I deem this load safe in MY RIFLE, NOT YOURS. DO NOT USE MY DATA! Fired cases fall from the chamber when the rifle is held vertically and shaken. The load was very consistent, with a low velocity of 1597fps and a high velocity of 1603fps. There is a genuine paucity of reliable data for the Browning with heavy bullets. The OAL must remain somewhat short to insure proper functioning through the short throat Browning. I will have another range session with a 1gr heavier charge. Otherwise the load will be identical
This pic. shows the 550gr bullet to the left. A Mt. Baldy 400gr FNGC is shown for comparison.
The target was shot at 50yrds from the bench. Big fun! The vertical stringing is certainly the result of several factors including but not limited, by my bench technique, barrel time(big, heavy, relatively slow, bullet shot from a heavy recoiling rifle) decreasing rifle weight as mag. tube empties, etc...
The little beast herself.
A poor picture showing the top of the drilled and tapped barrel. 3 pairs of holes.
If anyone has any info regarding an Adco B-86, it would be appreciated. Perhaps the father was mistaken and this was not a factory conversion but rather work done by a shop called Adco after the rifle was purchased. Thanks, 1886.
Evidently you have put the little Beastie to paper. What are the result at 50 and 100 yards?
