mcwoodduck answered your strength question g'nuf.
But the standard Browning 1885's did not follow the larger case in HW's and smaller case in LW's exactly... the 28" octagon HW's came in small to larger case cartridges - the 24" octagon LW's in small and mid size case cartridges.
Their other 1885 (and B-78) models add more to the mix... the Traditional Hunter HW had a 30" octagon barrel for 30-30, 38-55 and 45-70 while the LW of this model 357MAG, 44MAG and 45Colt with half round-half octagon 24" barrels. Their BPCR models had half/half 30" & 34" barrels for 40-65, 45-70 and 45-90 black powder. And the B-78's had 24" & 26" round or octagon barrels for mid to large case cartridges.
There is a big difference in approximate weight between the 1885 HW/LW as well... the HW 8.75 and LW 6.25 pounds. So in use the HW was heavy by the time you put a scope and sling on it for carry (my last 22-250 over 11#), but the LW set up the same is quite pleasant to carry (my 22 Hornet was about 7.5#). These were a little higher weight because both wore fairly big target scopes for small targets at long ranges.
Accuracy? I always get a chuckle out of accuracy questions. The firearm itself is only a part of the equation... with many other factors that play a huge roll in consistent precision. To hit small you have to aim small, so the better the sights... A load tuned to the firearm is a must for consistant precision. Conditions are variable, but with lots of experience and knowing your firearms/loads ballistics you can get past reasonably poor conditions with any firearm. Nothing but a hellofalot of shooting time and lead down range makes a consistant trigger jockey. So accuracy will be dependant on each factor and will vary accordingly. But these rifles are very capable of getting the job done if the I's are dotted and the T's crossed.
I wasn't a paper shooter beyond sight in and load work, nor did I bother to take pictures of targets. But with quality scopes, tuned loads and very long experience shooting long range with these and many other firearms my B-78's and 1885's were pure death in the killing fields no matter what the game was. As a very serious ADC predator and long range varmint hunter since the 50's who shot 1,000's to 10,000's of rounds a year, what were ethical shots for me some folks might not feel comfortable shooting though.