Hello all, here is today's article posted on TheArmoryLife.com. It is titled "How to Use a BDC Reticle" and can be found at https://www.thearmorylife.com/how-to-use-a-bdc-reticle/.
How to Use a BDC Reticle
- Thread starter Mike H.
- Start date
Annihilator
Emissary
Good article, I always did have trouble figuring out how to use this type of scope correctly, thanks Mike.
TEXASforLIFE
Ronin
As always a good 1 Mike!
Some list or sell by cartridge specific with listed grain and velocity specs, but I haven't seen barrel length with it. Without having a chrono to varify candy add too necessary adjustments. Circle dot or horseshoe dot with bdc dots or lines the with optic info should give that info. Some start with 7 yards and go to 800. The 5.56 is most likely a m4 velocity and then the rest are 300bo and 7.62nato. Nikon had a 308win version (tactical). There might be a/some 6.5cm versions? Some as in manufacturers sites list those types and drops in distances per cartridge and bullet weight, not caliber. Most are fmj except for the 5.56 might be 62lap (green tip).
Some list or sell by cartridge specific with listed grain and velocity specs, but I haven't seen barrel length with it. Without having a chrono to varify candy add too necessary adjustments. Circle dot or horseshoe dot with bdc dots or lines the with optic info should give that info. Some start with 7 yards and go to 800. The 5.56 is most likely a m4 velocity and then the rest are 300bo and 7.62nato. Nikon had a 308win version (tactical). There might be a/some 6.5cm versions? Some as in manufacturers sites list those types and drops in distances per cartridge and bullet weight, not caliber. Most are fmj except for the 5.56 might be 62lap (green tip).
BDC scopes are supposed to be used at maximum power.
However if bullets are striking lower than subtended,
at 400 yards for example,
couldn't the power be gradually decreased
until the 400 yard hash mark subtends the point of impact?
In essence, "indexing" the reticle by adjusting the power
instead of mapping the reticle and committing it to memory.
However if bullets are striking lower than subtended,
at 400 yards for example,
couldn't the power be gradually decreased
until the 400 yard hash mark subtends the point of impact?
In essence, "indexing" the reticle by adjusting the power
instead of mapping the reticle and committing it to memory.
TEXASforLIFE
Ronin
Depends on the scope! FFP or SFP, ranging, drop per 100 yards and/or cartridge.
HansGruber
Ronin
Depends on if it’s a FFP or SFP reticle.
If the scope manufacturer
prescribes using the maximum power setting
for their BDC reticle it would be because
lower power settings subtend a larger dimension.
Which in turn means that it is an SFP scope.
That being the case,
for a desired range chosen in advance,
why not index the power ring
so that a given hash mark
will subtend the point of impact.
prescribes using the maximum power setting
for their BDC reticle it would be because
lower power settings subtend a larger dimension.
Which in turn means that it is an SFP scope.
That being the case,
for a desired range chosen in advance,
why not index the power ring
so that a given hash mark
will subtend the point of impact.
