Do you mean the OP lacks the skills to make it a decent 1000 yd shooter? That may be so. Tuning a Lee Enfield to shoot is a dieing art/science. The rifle must be properly bedded. This includes a special incantation, shims and something to do with a dead cat at midnight. The OP probably is not one of those with the skill set.
Every year 1,000 + markmen from around the world meet at Bisley, England to shoot. The ranges there go back to 1,200 yards. Until about 1985 the rifle of choice used by most for long range shooting was a Lee Enfield #4. We used a heavy single shot match rifle for 300 to 600 yards and most of us used a #4 at 900 and 1000 because it was more accurate.
In 1984 I had a good shoot, and after a week of shooting I only missed the long range bullseye on two shots. (24" bull. Iron sights, shot off the elbows, using military ball ammo.) I used a #4 at long range. Most of the 1500 other shooters also preferred the #4 for long range.
The Lee Enfield can be tuned to "compensate". As you know, bullets exit the barrel at different speeds. At 1000 yards, the slower bullets would tend to hit the target somewhat lower than the faster ones.
You also know the barrel "whips". If the muzzle is whipping up as the bullets exit (known as positive compensation) the slower bullets will exit when the barrel is higher than than when the faster bullets. So the rifle "compensates" for the slower bullets by aiming them higher.